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How to write the eighth question on page 103 of the first volume of fifth grade mathematics?
Calculation formula of trapezoidal area. The reference answer on page 103 of the fifth grade math book is as follows. This is arrangement and review. It is a formula for calculating the area of parallelogram, triangle and trapezoid. As long as the formula is memorized, it is very simple to do the application problem. The area of a parallelogram is the base times the height. The area of a triangle is the base multiplied by the height and divided by 2. The area of a trapezoid is the sum of the upper and lower bottoms multiplied by the height and divided by 2.