Question

What is the area of a right triangle with a height of eighteen and one-fourth meters and a base of 42 meters?

seven hundred sixty-six and one-half m2
three hundred eighty-three and one-fourth m2
sixty and one-fourth m2
thirty and one-half m2

Answer 1

A = 383
`(1)/(4)` m²

Explanation:

the area (A) of a triangle is calculated as

A =
`(1)/(2)` bh ( b is the base and h the height )

=
`(1)/(2)` × 42 × 18
`(1)/(4)` ( change mixed number to improper fraction )

= 21 ×
`(73)/(4)`

=
`(21(73))/(4)`

=
`(1533)/(4)`

= 383.25

= 383
`(1)/(4)` m²