Worked example
A triangle has base 8 cm and height 5 cm. What is its area?
Answer & why
Answer: 20
½ × 8 × 5 = 20 square centimeters.
Grade 6 · Math
Find triangle area
Use half the product of base and perpendicular height.
8 generated examples + worked example
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8 reproducible examples from this math generator. Choose New examples for another set.
Question 1
A triangle has base 8 cm and perpendicular height 7 cm. What is its area in square centimeters?
- 30
- 56
- 28
- 31
A hint
A triangle covers half of a rectangle with the same base and height.
Answer & why
Answer: 28
Area = ½ × base × perpendicular height = ½ × 8 × 7 = 28.
Question 2
A triangle has base 4 cm and perpendicular height 11 cm. What is its area in square centimeters?
- 24
- 22
- 25
- 21
A hint
A triangle covers half of a rectangle with the same base and height.
Answer & why
Answer: 22
Area = ½ × base × perpendicular height = ½ × 4 × 11 = 22.
Question 3
A triangle has base 30 cm and perpendicular height 3 cm. What is its area in square centimeters?
- 44
- 90
- 46
- 45
A hint
A triangle covers half of a rectangle with the same base and height.
Answer & why
Answer: 45
Area = ½ × base × perpendicular height = ½ × 30 × 3 = 45.
Question 4
A triangle has base 6 cm and perpendicular height 3 cm. What is its area in square centimeters?
- 9
- 7
- 11
- 12
A hint
A triangle covers half of a rectangle with the same base and height.
Answer & why
Answer: 9
Area = ½ × base × perpendicular height = ½ × 6 × 3 = 9.
Question 5
A triangle has base 22 cm and perpendicular height 7 cm. What is its area in square centimeters?
- 77
- 154
- 75
- 78
A hint
A triangle covers half of a rectangle with the same base and height.
Answer & why
Answer: 77
Area = ½ × base × perpendicular height = ½ × 22 × 7 = 77.
Question 6
A triangle has base 14 cm and perpendicular height 7 cm. What is its area in square centimeters?
- 52
- 49
- 51
- 98
A hint
A triangle covers half of a rectangle with the same base and height.
Answer & why
Answer: 49
Area = ½ × base × perpendicular height = ½ × 14 × 7 = 49.
Question 7
A triangle has base 20 cm and perpendicular height 14 cm. What is its area in square centimeters?
- 139
- 140
- 141
- 142
A hint
A triangle covers half of a rectangle with the same base and height.
Answer & why
Answer: 140
Area = ½ × base × perpendicular height = ½ × 20 × 14 = 140.
Question 8
A triangle has base 22 cm and perpendicular height 13 cm. What is its area in square centimeters?
- 286
- 145
- 143
- 141
A hint
A triangle covers half of a rectangle with the same base and height.
Answer & why
Answer: 143
Area = ½ × base × perpendicular height = ½ × 22 × 13 = 143.