Activity 3.2 A. Directions: Find the Area of the following geometrical figures. Use separate sheet of paper for your answers.
1. What is the area of a 25" diameter circle?
2. What is the area of a 20" x 15" feet tool room? a
3. What is the area of a triangle with a 12" base and a 15" height?
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1. What is the area of a 25" diameter circle?
2. What is the area of a 20" x 15" feet tool room? a
3. What is the area of a triangle with a 12" base and a 15" height?
PLSS SEND HELP
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Answer:
1. Area of a circle: Tr²
Radius = 1/2 of diameter
25/2 = 12.5
(3.14) * (12.5) ^ 2
(3.14)(156.25)
A = 490.625
2. I assumed the room was a rectangle
Area of rectangle: length x width
20 * 15 = 300
A = 300
3. Area of a triangle: 1/2 of base x height
12 * 15 = 180
180/2 = 90
A = 90