Answer:
x = 5
Step-by-step explanation:
Angles DEB and AEC are vertical angles, so they are congruent, and their measures are equal.
8x - 3 = 5x + 12
3x = 15
radius (r) = 8cm
circumference = 2π×r
= 2 × 3.14 × 8
= 50.24cm
area = π × r²
= 3.14 × 8 × 8
= 200.96cm²
rationalise the denominator by multiplying both top and bottom by (8-5√3) then expand and simplify
10, 11 , 16, 18 &19
