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Solve this faster with the right shortcut first
Shortcut used: Triangle area = half of base × height.
Solve in 3 steps:
- Write the ratio clearly.
- Find the common multiplier.
- Apply it to the missing term.
Common mistake: Do not scale only one side of the ratio.
Question 3
Multiple Choice Question
Question
The base and height of a triangle are 20 cm and 11 cm. Find its area.
Explanation
Correct Answer: D
ANSWER
Correct Answer: D
Method / Topic: Mensuration
Area = 1/2 × base × height = 1/2 × 20 × 11 = 110 cm².
Why this answer is correct
The answer keeps the ratio proportional.
Short Explanation
Area = 1/2 × base × height = 1/2 × 20 × 11 = 110 cm².
Detailed Explanation
Question
The base and height of a triangle are 20 cm and 11 cm. Find its area.
ANSWER
Correct Answer: D
Method / Topic: Mensuration
Multiply base and height, then divide by 2.
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Question 3
Learn + Solve: Shortcut, Trap & Fast Route Click to view shortcut, steps, and common mistake
Learn + solve
Shortcut used, common trap, and the fastest solving route
Shortcut used: Triangle area = half of base × height.
Solve in 3 steps:
- Write the ratio clearly.
- Find the common multiplier.
- Apply it to the missing term.
Common mistake: Do not scale only one side of the ratio.
Question
The base and height of a triangle are 20 cm and 11 cm. Find its area.
Explanation
Correct Answer: D
ANSWER
Correct Answer: D
Method / Topic: Mensuration
Area = 1/2 × base × height = 1/2 × 20 × 11 = 110 cm².
Why this answer is correct
The answer keeps the ratio proportional.
Short Explanation
Area = 1/2 × base × height = 1/2 × 20 × 11 = 110 cm².
Detailed Explanation
Question
The base and height of a triangle are 20 cm and 11 cm. Find its area.
ANSWER
Correct Answer: D
Method / Topic: Mensuration
Multiply base and height, then divide by 2.
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Triangle area = half of base × height.
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