10-5 Trigonometry and Area10-5 Trigonometry and AreaTo find areas of regular polygons and

triangles using trigonometry

Using trigonometric functions, students will calculate the areas of triangles and regular polygons accurately, efficiently, and to a degree of precision appropriate to the situation.

10-4 Quiz• The following questions are designed to help you

determine how well you understood today’s lesson.

• Please take time to ask questions if you miss one and don’t know why!

• Record the number you get right on your portfolio sheet

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1. Find the area of the regular polygon. Give the answer to the nearest tenth.

pentagon with a side of 6 ft

A. 49.5 ft2

B. 61.9 ft2

C. 123.9 ft2

D. 12.4 ft2

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2. Find the area of the regular polygon. Give the answer to the nearest tenth.

hexagon with a side of 6 in.

A. 9 in2

B. 31.2 in2

C. 93.5 in2

D. 187.1 in2

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3. Find the area of the regular polygon. Give the answer to the nearest tenth.

square with a radius of 13 ft

A. 338 ft2

B. 169 ft2

C. 676 ft2

D. 343 ft2

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4. A park in a subdivision is triangular-shaped. Two adjacent sides of the park are 581 feet and 540 feet. The angle

between the sides is 83 . To the nearest unit, find the area of the park in square yards.

A. 51,900 yd2

B. 34,600 yd2

C. 38,925 yd2

D. 17,300 yd2

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5. Find the area of the triangle. Give the answer to the nearest tenth. The drawing may not be to scale.

9 cm

15 cm

A. 126.9 cm2

B. 63.4 cm2

C. 23.1 cm2

D. 185.5 cm2

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ASSIGNMENTASSIGNMENT

•10-5 p.646-647 #6-36 even

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Be sure to RATE your understanding of the lesson 4-3-2-1-0 after you finish it AND give me

one complete sentence as to why you rated yourself that way then summarize what the

lesson was about in a sentence or two.