Mathematics for IGCSE & O level - Similarity (Section 2 - No. 1)
If the height of a triangle is doubled while the base remains constant, what is the effect on the area?
The area doubles.
The area is halved.
The area is multiplied by 4.
The area remains the same.
Explanation
Area = 0.5*base*height. Doubling the height doubles the area.
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