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

10 miles

step-by-step explanation:

step-by-step explanation: given equation a = h(b 1+b 2)

also we are given values of a, h and b 1 as :

a = 16, h = 4, and b 1 = 3.

in order to solve it for b 2, we need to plug the given values of   a, h and b 1 .

therefore, plugging values of   a, h and b 1   in given equation, we get

16 = 4( 3 + b 2)

first dividing both sides by 4, we get

4 = 3 + b 2

subtracting 3 from both sides, we get

4 -3 = 3 -3 + b 2

1 = b 2.