Area of Triangle = × base × height
Area of Parallelogram = base × height
Area of Trapezoid = (base1 + base2) × height
Use the formula for the area of a parallelogram.
The height of a parallelogram is the perpendicular distance between either of the two sets of parallel sides.
So, the height is 3 cm, not 3.1 cm.
Area | = | bh |
| = | (6.5 cm)(3 cm) |
| = | 19.5 cm2 |
Use the formula for the area of a trapezoid.
The bases are the sides which are parallel.
The height is the perpendicular distance between the bases.
Area | = | (b1 + b2)h |
| = | (5.8 cm + 6.6 cm)(3 cm) |
| = | (12.4 cm)(3 cm) |
| = | (37.2 cm2) |
| = | 18.6 cm2 |