A. AB. BC. CD. D

A. 150.6 in2

B. 131.7 in2

C. 124.6 in2

D. 79 in2

The rectangular matting for a picture frame has a circular cutout as shown in the figure. What is the approximate area of the matting?

Do Now

Objectives:

SWBAT access and apply acquired knowledge from chapter 11

A. AB. BC. CD. D

A. Name a pair of alternate interior angles?

A. AB. BC. CD. D

A. If the m3 = 109°, find m7?

Concept A

Use Algebra to Find Missing Angle Measures

ALGEBRA Angles DEF and WXY are supplementary angles, with mDEF = 2x + 5 and mWXY = x – 26. Find the value of x and measure of DEF.

Classify Quadrilaterals

Classify the quadrilateral shown using the name that best describes it.

A. AB. BC. CD. D

A.

Classify the polygon. Then determine whether it appears to be regular or not regular.

B.

A. AB. BC. CD. D

Find the measure of each interior angle of a regular nonagon.

A. AB. BC. CD. D

A B C D

0% 0%0%0%

Find the exact circumference of a circle with a radius of 7.2 mm.

A. AB. BC. CD. D

A B C D

0% 0%0%0%

A. 7.6 ft

B. 15.3 ft

C. 47.1 ft

D. 150.7 ft

SWIMMING POOL A circular swimming pool has a circumference of 48 feet. Matt must swim across the diameter of the pool. How far will Matt swim?

Find the area of the shaded region. Round to the nearest tenth.

Concept

A. AB. BC. CD. D

A B C D

0% 0%0%0%

A. 71.1 cm2

B. 58.6 cm2

C. 58.3 cm2

D. 52.3 cm2

Find the area of the figure to the nearest tenth.