marialau120 marialau120

24-09-2019
Mathematics

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The height of a triangle is twice it's base. If the area of the triangle is 40 cm squared, what is the measure of it's height

The height of a triangle is twice its base If the area of the triangle is 40 cm squared what is the measure of its height class=

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kamraaa kamraaa

24-09-2019

A = bh/2
40 = x(2x)/2
80 = 2x²
40 = x²
x = sqrt40
x = +/- 2sqrt10
Measurement cannot be negative therefore x = 2sqrt10
Height = 2x = 2(2sqrt10) = 4sqrt10
The height of the triangle is 4sqrt10 cm or approximately 12.65cm.

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