Answer:
19.7 cause you add 5.7+7+7
x=48°
Step-by-step explanation:
1.the triangle is an isosceles triangle
2.cause two of it's sides are equal 7=7
3.by using the sum of angles in a triangle
4.you add the 66°+66° and subtract from 180°
A. Linear- the add up to 180
B. 3x-5+2x+3+4x+2=180
9x=180
x=20
C. plug x in
ABD- 55, DBK- 82, KBC- 43
It is in the form of a² - b²
so it's correct product is
64x² - 16
is: