A triangular gable end is 28 ft wide at the base and 7 ft high at the peak. What is its area in square feet?
Answer in sq ft.
Show the answer
98 sq ft
Area = 1/2 × base × height = 0.5 × 28 × 7 = 98 sq ft.
Reference: Area of a triangle: A = ½ × b × h
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Geometry practice questions
40 questions from the trade math and blueprint reading practice test.
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Geometry practice test
10 questions, graded as you go, with the reason for every answer. No sign-up.
What this covers
- Perimeter
- Area
- Circles
- Volume
- Pythagorean theorem
- Angles
Sample questions
A round tank is 10 in in diameter. About how long must a strap be to wrap once around it?
- 78.5 in
- 62.8 in
- 31.4 in
- 15.7 in
Show the answer
C. 31.4 in
Circumference = π × diameter = 3.1416 × 10 = 31.4 in. 78.5 is the area (πr²) in square inches, and 62.8 comes from using the diameter in the radius formula 2πr.
Reference: Circumference of a circle: C = πd
A circular concrete pad is 6 ft in diameter. What is its area in square feet? Round to one decimal place.
Answer in sq ft.
Show the answer
28.3 sq ft
Radius = 6 ÷ 2 = 3 ft. Area = π × r² = 3.1416 × 3² = 3.1416 × 9 = 28.27 sq ft, about 28.3 sq ft.
Reference: Area of a circle: A = πr²