Area effect

Geometry Level 2

If the height of a triangle is decreased by 40% and its base is increased by 40%, what would be the effect on its area?

16% decrease 8% decrease No changes 8% increase 16% increase

Munem Shahriar by Munem Shahriar , 18, Bangladesh

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1 solution

Marta Reece
May 11, 2017

A 1 = 1 2 b h A_1=\frac{1}{2}bh

A 2 = 1 2 × 1.4 b × 0.6 h = 0.84 × 1 2 b h = ( 100 − 16 ) A_2=\frac{1}{2}\times 1.4b\times0.6h=0.84\times\frac{1}{2}bh=(100-16) % of 1 2 b h \frac{1}{2}bh .

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