Whats the answers of Properties of Quadrilaterals?

b = 4 , c = 8

Step-by-step explanation:

Using the sine ratio in the right triangle and the exact value

sin30° = , then

sin30° = = = ( cross- multiply )

c = 8

Using Pythagoras' identity in the right triangle

b² + 4² = 8²

b² + 16 = 64 ( subtract 16 from both sides )

b² = 48 ( take the square root of both sides )

b = = = 4