The correct answer is x^2-4x-12
Divide the perimeter by 3 to find the side length.
Since the formula for the are of a triangle is
1/2 * b * h the height must be found.
If a perpendicular line is drawn from the apex of the triangle, a right triangle is formed with a base of 5 and a hypotenuse of 10. Also since it originally was equilateral the base angle is 60 degrees. The rules for finding lengths of sides of equal. Triangles is long leg = sqrt3 * short leg
the height is the long leg so the height is 5sqrt3.
A=(1/2)(10)(5sqrt3)= 25sqrt3
Answer:
B. Angle E=43
Step-by-step explanation:
Angles DEF are = to 73 degrees
73-43=30/2=15
15+15+43=73
Answer:
38
Step-by-step explanation:
10+10=20
9+9=18
20+18=38
