The roof on a house has one side that is in the shape of an isosceles triangle. If the sides of this part are 18 feet long and the angle at the peak is 50°, what is the area of this part of the roof to the nearest tenth of a foot?

124.1 feet

Step-by-step explanation:

An isosceles triangle is one which has two equal sides and two equal angles.

Area of triangle = ab SinC

where a and b are the sides, and C is the given included angle.

From the given question, a = b = 18 feet and C = 50°.

Then,

Area of this part of the roof = x 18 x 18 x Sin 50°

                                                 = x 18 x 18 x 0.7660

                                                = 162 x 0.7660

                                                 = 124.092

The area of this part of the roof is 124.1 feet.

b

step-by-step explanation:

the total is 23.97. 0.25% is off so you have to subtracting 25% from 100% and you will get 75% if you convert it to decimal you will get 0.75. you have to find the original because the formula is % times original = total.so you have the total and the % so you just have to plug it in.

the answer is 62