Answer:
h = 13 cm
Explanation:
the area (A) of a triangle is calculated as
A =
bh ( b is the base and h the perpendicular height )
here b = 6 and h = 13 , then
A =
× 6 × 13 = 3 × 13 = 39 cm²
Then the area (A) of the parallelogram = 4 × 39 = 156 cm²
the area (A) of the parallelogram is calculated as
A = bh ( b is the base and h the height )
here b = 12 , then
12h = 156 ( divide both sides by 12 )
h = 13