How do i find the perimeter of the triangle

Fine the area of the kite. a. 90 sq. units b. 9 sq. units c. 180 sq. units d. 45 sq. units

Drag the tiles to the boxes to form correct pairs. not all tiles will be used. match each set of vertices with the type of quadrilateral they form.

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.