Match the formula with the polygon.

polygons:
1. triangle; 2. rhombus; 3. parallelogram; 4. square; 5. trapezoid; 6. regular polygon; 7. equilateral triangle

formulas:
a = bh
a = 1/2 h(b1 + b2)
a = s^2
a = 1/2 d1 d2
a = 1/2 ap
a = 1/2 bp
a = 1/4 s^2 sqrt(3)