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Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–4) NGSSS Then/Now New Vocabulary...

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Over Lesson 10–4 A.A B.B C.C D.D 5-Minute Check 1 A.60 B.55 C.50 D.45 Refer to the figure. Find m  1.
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Page 1: Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–4) NGSSS Then/Now New Vocabulary Example 1:Identify Common Tangents Theorem 10.10 Example.
Page 2: Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–4) NGSSS Then/Now New Vocabulary Example 1:Identify Common Tangents Theorem 10.10 Example.

Five-Minute Check (over Lesson 10–4)NGSSSThen/NowNew VocabularyExample 1:Identify Common TangentsTheorem 10.10Example 2:Identify a TangentExample 3:Use a Tangent to Find Missing ValuesTheorem 10.11Example 4:Use Congruent Tangents to Find MeasuresExample 5:Real-World Example: Find Measures in Circimscribed

Polygons

Page 3: Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–4) NGSSS Then/Now New Vocabulary Example 1:Identify Common Tangents Theorem 10.10 Example.

Over Lesson 10–4

A. AB. BC. CD. D

A B C D

0% 0%0%0%

A. 60

B. 55

C. 50

D. 45

Refer to the figure. Find m1.

Page 4: Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–4) NGSSS Then/Now New Vocabulary Example 1:Identify Common Tangents Theorem 10.10 Example.

Over Lesson 10–4

A. AB. BC. CD. D

A B C D

0% 0%0%0%

A. 30

B. 25

C. 20

D. 15

Refer to the figure. Find m2.

Page 5: Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–4) NGSSS Then/Now New Vocabulary Example 1:Identify Common Tangents Theorem 10.10 Example.

Over Lesson 10–4

A. AB. BC. CD. D

A B C D

0% 0%0%0%

A. 35

B. 30

C. 25

D. 20

Refer to the figure. Find m3.

Page 6: Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–4) NGSSS Then/Now New Vocabulary Example 1:Identify Common Tangents Theorem 10.10 Example.

Over Lesson 10–4

A. AB. BC. CD. D

A B C D

0% 0%0%0%

A. 120

B. 100

C. 80

D. 60

Refer to the figure. Find m4.

Page 7: Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–4) NGSSS Then/Now New Vocabulary Example 1:Identify Common Tangents Theorem 10.10 Example.

Over Lesson 10–4

A. AB. BC. CD. D

A B C D

0% 0%0%0%

A. 10

B. 11

C. 12

D. 13

find x if mA = 3x + 9 and mB = 8x – 4.

Page 8: Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–4) NGSSS Then/Now New Vocabulary Example 1:Identify Common Tangents Theorem 10.10 Example.

Over Lesson 10–4

A. AB. BC. CD. D

A B C D

0% 0%0%0%

A. 47.5°

B. 95°

C. 190°

D. 265°

The measure of an arc is 95°. What is the measure of an inscribed angle that intercepts it?

Page 9: Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–4) NGSSS Then/Now New Vocabulary Example 1:Identify Common Tangents Theorem 10.10 Example.

MA.912.G.6.1 Determine the center of a given circle. Given three points not on a line, construct the circle that passes through them. Construct tangents to circles. Circumscribe and inscribe circles about and within triangles and regular polygons. MA.912.G.6.4 Determine and use measures of arcs and related angles. Also addresses MA.912.G.6.2 and MA.912.G.6.3.

Page 10: Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–4) NGSSS Then/Now New Vocabulary Example 1:Identify Common Tangents Theorem 10.10 Example.

You used the Pythagorean Theorem to find side lengths of right triangles. (Lesson 8–2)

• Use properties of tangents.• Solve problems involving circumscribed

polygons.

Page 11: Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–4) NGSSS Then/Now New Vocabulary Example 1:Identify Common Tangents Theorem 10.10 Example.

• tangent• point of tangency• common tangent

Page 12: Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–4) NGSSS Then/Now New Vocabulary Example 1:Identify Common Tangents Theorem 10.10 Example.

Identify Common Tangents

A. Copy the figure and draw the common tangents. If no common tangent exists, state no common tangent.

Answer: These circles have no common tangents. Any tangent of the inner circle will intercept the outer circle in two points.

Page 13: Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–4) NGSSS Then/Now New Vocabulary Example 1:Identify Common Tangents Theorem 10.10 Example.

Identify Common Tangents

B. Copy the figure and draw the common tangents. If no common tangent exists, state no common tangent.

Answer: These circles have 2 common tangents.

Page 14: Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–4) NGSSS Then/Now New Vocabulary Example 1:Identify Common Tangents Theorem 10.10 Example.

A. AB. BC. CD. D

A B C D

0% 0%0%0%

A. 2 common tangents

B. 4 common tangents

C. 6 common tangents

D. no common tangents

A. Copy the figure and draw the common tangents to determine how many there are. If no common tangent exists, choose no common tangent.

Page 15: Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–4) NGSSS Then/Now New Vocabulary Example 1:Identify Common Tangents Theorem 10.10 Example.

A. AB. BC. CD. D A B C D

0% 0%0%0%

A. 2 common tangents

B. 3 common tangents

C. 4 common tangents

D. no common tangents

B. Copy the figure and draw the common tangents to determine how many there are. If no common tangent exists, choose no common tangent.

Page 16: Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–4) NGSSS Then/Now New Vocabulary Example 1:Identify Common Tangents Theorem 10.10 Example.
Page 17: Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–4) NGSSS Then/Now New Vocabulary Example 1:Identify Common Tangents Theorem 10.10 Example.

Identify a Tangent

Test to see if ΔKLM is a right triangle.?202 + 212 = 292 Pythagorean Theorem

841 = 841 Simplify.

Answer:

Page 18: Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–4) NGSSS Then/Now New Vocabulary Example 1:Identify Common Tangents Theorem 10.10 Example.

A. AB. B

A B

0%0%

A.

B.

Page 19: Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–4) NGSSS Then/Now New Vocabulary Example 1:Identify Common Tangents Theorem 10.10 Example.

Use a Tangent to Find Missing Values

EW 2 + DW

2 = DE 2 Pythagorean Theorem

242 + x 2 = (x + 16)2 EW = 24, DW = x, and

DE = x + 16576 + x

2 = x 2 + 32x + 256 Multiply.

320 = 32x Simplify.10 = x Divide each side by 32.

Answer: x = 10

Page 20: Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–4) NGSSS Then/Now New Vocabulary Example 1:Identify Common Tangents Theorem 10.10 Example.

A. AB. BC. CD. D

A B C D

0% 0%0%0%

A. 6

B. 8

C. 10

D. 12

Page 21: Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–4) NGSSS Then/Now New Vocabulary Example 1:Identify Common Tangents Theorem 10.10 Example.
Page 22: Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–4) NGSSS Then/Now New Vocabulary Example 1:Identify Common Tangents Theorem 10.10 Example.

Use Congruent Tangents to Find Measures

AC = BC Tangents from the same exteriorpoint are congruent.

3x + 2 = 4x – 3 Substitution2 = x – 3 Subtract 3x from each side.5 = x Add 3 to each side.

Answer: x = 5

Page 23: Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–4) NGSSS Then/Now New Vocabulary Example 1:Identify Common Tangents Theorem 10.10 Example.

A. AB. BC. CD. D

A B C D

0% 0%0%0%

A. 5

B. 6

C. 7

D. 8

Page 24: Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–4) NGSSS Then/Now New Vocabulary Example 1:Identify Common Tangents Theorem 10.10 Example.

Find Measures in Circumscribed Polygons

Step 1 Find the missing measures.

Page 25: Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–4) NGSSS Then/Now New Vocabulary Example 1:Identify Common Tangents Theorem 10.10 Example.

Find Measures in Circumscribed Polygons

Step 2 Find the perimeter of ΔQRS.

Answer: So, the perimeter of ΔQRS is 36 cm.

= 10 + 2 + 8 + 6 + 10 or 36 cm

Page 26: Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–4) NGSSS Then/Now New Vocabulary Example 1:Identify Common Tangents Theorem 10.10 Example.

A. AB. BC. CD. D

A B C D

0% 0%0%0%

A. 42 cm

B. 44 cm

C. 48 cm

D. 56 cm

Page 27: Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–4) NGSSS Then/Now New Vocabulary Example 1:Identify Common Tangents Theorem 10.10 Example.

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