This document provides instruction and examples for calculating the areas of parallelograms, triangles, and trapezoids. It includes homework assignments asking students to calculate areas of geometric shapes using given measurements of lengths and bases. The document is a lesson plan for teaching area formulas to 7th grade math students.

1. OBJECTIVE: How do we find the area of
parallelograms, triangles, and trapezoids?
Do Now
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2. Homework: Pages 384-385 #7-20 all, 23, 26-31 all
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4. Anticipatory Set
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7. 3
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11. 7
1.) A back yard is shaped like a parallelogram with a height
of 32 feet and a base of 100 feet. One bag of grass seed
covers 125 square feet. What is the least number of bags of
seed needed to seed the lawn?
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2.) A triangular road sign has a height of 8 feet and a base
of 16.5 feet. How much larger in area is this sign than one
with a height of 4 feet and a base of 8.25 feet?
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C.) A flower bed is shaped like a trapezoid with a height
of 3 yards, one 2.5-yard base, and another 4.5-yard
base. A packet of flower seeds covers 5 square yards.
What is the least number of packets needed to plant the
flower bed?
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14. BEFORE YOU LEAVE
A rectangle and a parallelogram have sides that
measure 3 m., 4 m., 3 m., and 4 m. Do the figures
have the same area?
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15. Mr. Tjersland's Math 7
Homework: 1.) Pages 432-433 #8-13 all, 26, 27
2.) PAges 436-437 #7-12 all, 22-25 all, 28-35 all
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