Dec 17, 2015
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.