Question

Find the height of a triangle with an area of 42 square inches and base of 7 inches. Use the formula for the area of a triangle a=1/2bh

Answer 1

A= 1/2bh

fill in formula with known numbers

42= 1/2(7)h
multiply numerators on right side

42= (1*7)/2h

42= 7/2h
divide both sides by 7/2

42 ÷ 7/2= h
to divide fractions, multiply by reciprocal/inverse of 7/2

42 * 2/7= h
multiply numerators

(42 * 2)/7= h

84/7= h

12 inches= h


ANSWER: The height is 12 inches.

Hope this helps! :)

Answer 2

h=12 in

A=1/2bxh

42=3,5xh

Divide boh sides by 3.5

12=h