Geometry Chapter 1 - Essentials of Geometry Section 1.7 - Find perimeter, circumference, and area What the student should get from this: 1. Apply formulas for perimeter, area, and circumference What is perimeter?
38 ft
What is the perimeter of the figure at the right? (assume right angles) 26 ft
46 ft For rectangular figures p = 2l + 2w 14.3 ft Example: 5.8 ft
For triangular figures... add up the sides.!!
6 cm !
Example:
6 5cm For circles, use C = 2! r or C = ! d Example: 15 cm
Another Example: What is the radius of the circle with circumference of 15 cm?
15 cm
6 cm