Find perimeter of 30-60-90 triangle if long leg is 4 times square root of 15

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?

How does reflecting or rotating a figure change the interior angles of the figure?

To prove that angle def = angle dgf by sas, what additional information is needed? def congruent to dgf dfe congruent to dfg de congruent to dg dg congruent to gf