I Complete the following exercises by using the formula for finding the
area of a triangle.
Formula
h (altitude)
A=
- on
A
b (base)
(1) Find the area of a triangle whose base is 10 cm and altitude is 20 cm.
[Sol] By using the formula A=
-bh,
,
A = *10
x 10 x
Ans.
cm
unit

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)

126.66 m²

step-by-step explanation:

the pertinent area formula is a = πr², where r is the radius.

here, a = π(6.35 m)² = 40.32π, or approximately 126.66 m²