Area challenge

The  exercise appears under the 6th grade (U.S.) Math Mission. This exercise practice solving problems involving triangles, parallelograms, and composite figures. Problems include decimals, fractions, and word problems. Area of circles is not included.

Types of problems
There are four type(s) of problem in this exercise:
 * 1) Find the area of the rectangle: This problem has a rectangle and user is asked to find the area of it.
 * 2) Find the area of the parallelogram: This problem has a parallelogram and user is asked to find the area of it.
 * 3) Find the area of the triangle: This problem has a triangle along user is asked to find the area of it.
 * 4) Find the area of the trapezoid: This problem has a trapezoid along and user is asked to find the area of it.

Strategies
Basic knowledge of finding area is required for this exercise.
 * 1) All four types of problems in this exercise may or may not have a word problem involved.
 * 2) The formula for the area of rectangles and parallelograms is $$A=l\times w$$.
 * 3) The formula for the area of a triangle is $$A=\frac{1}{2}b\times h$$.
 * 4) The formula for the area of a trapezoid is $$A=\frac{1}{2}(b_1+b_2)\times h$$.

Real-life Applications

 * 1) Area and perimeter are used in many jobs for architecture and interior design.