The area of a triangle is 40 cm2. the height of the triangle is 4 cm. what is the measure of the base of the triangle? a. 40 cm b. 32 cm c. 28 cm d. 20 cm

Step-by-step explanation:

Givens

Height = h = 4cm

b = ?

Area = 40 cm^2

Formula

Area = 1/2 * h * b

Solution

40 cm^2 = 1/2 * 4 * b      Combine the right

40 cm^2 = 2 * b              Divide by 2

40 cm^2 /2 = 2b/2         Do the division

20 cm = b

Answer D

a reflection across the x axis and a 90 degree rotation left and right.

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