Question

18. The area of a right triangle is 30 cm². The length

of one leg of the triangle is 5 cm. What is the
length of the other leg?
(A) 6 cm
(B) 12 cm
(C) 18 cm
(D) 24 cm

Answer 1

12

Explanation:

The area of a triangle is calculated with the following formula:

`(1)/(2) *b*h` (b: base, h: height (or legs))

We can use this formula to find the length of the other leg:

30 =
`(1)/(2) *b*h` multiply both sides with 2 to get rid of fraction

60 = b*h one of the leg's length is given as 5 so

60 = 5*h divide both sides by 5

12 = h is the length of the missing leg.