PLZ HELP The measures of two angles of a triangle are 25° and 87°. Is the triangle acute, right, or obtuse? Explain.

A.

Acute; the measure of the third angle is 68°. So all three angles are acute.

B.

Acute; the measure of the third angle is 78°. So all three angles are acute.

C.

Obtuse; 25° + 87° = 112° and 112° is an obtuse angle.

D.

Right; 25° + 87° = 112° and 202°

−

112° = 90°.

20

step-by-step explanation:

the answer is $42.96

step-by-step explanation:

step-by-step explanation:

arc length = 6.63311 ft.

step-by-step explanation:

the formula the arc measure is:

arc length s=2πr(c)/360

where:

c   is the central angle of the arc in degrees

r   is the radius of the arc

π   is pi, approximately 3.142

using the above formula we get

s =

thus we find that arc length of an arc for a circle of radius 20 feet and central angle 19 degrees is

6.63311 feet