# Perimeter and Area of Quadrilaterals and Triangles 9-1

View again

All materials on our website are shared by users. If you have any questions about copyright issues, please report us to resolve them. We are always happy to assist you.
Information Report
Category:

## Documents

Published:

Views: 13 | Pages: 8

Share
Description
Perimeter and Area of Quadrilaterals and Triangles 9-1. I can find the perimeter of triangles, parallelograms , rectangles, and trapezoids. I can find the area of triangles, parallelograms, rectangles , and trapezoids.
Transcript
Perimeter and Area of Quadrilaterals and Triangles9-1 I can find the perimeter of triangles, parallelograms, rectangles, and trapezoids. I can find the area of triangles, parallelograms, rectangles, and trapezoids. I can find missing measurements given the area or perimeter.Review: Special Right Triangles45°30°45°60°**Answers need to be left as simplified radical. Note: Textbook says to round to the nearest tenth… Do not follow these directions! Leave as simplified radical!!`Example Find the perimeter of the rectangle, in which A = (79.8x2 – 42) cm2Step 1 Use the area and the height to find the base.A = bh79.8x2 – 42 = b(21)3.8x2 – 2 = bStep 2 Use the base and the height to find the perimeter.P = 2b + 2hP = 2(3.8x2 – 2)+ 2(21)P = (7.6x2 + 38) cmExample Find the height of a rectangle in which b = 3 in. and A = (6x² + 24x – 6) in2. A = bh6x2 + 24x – 6 = 3h3(2x2 + 8x – 2) = 3h2x2 + 8x – 2 = hh = (2x2 + 8x – 2) in.56 56 Example Find the base of the parallelogram in which h = 56 yd and A = 28 yd2.A = bh28 = b(56) b = 0.5 yd Example Find the base of the triangle, in which A = (15x2) cm2. 6x = bb = 6x cmExample Find b2 of the trapezoid, in which A = 231 mm2.42 = 23 + b219 = b2b2 = 19 mmExample Find the area of the triangle.Find b.A = 96 m2
Recommended

9 pages

8 pages

26 pages

4 pages

6 pages

6 pages

9 pages

8 pages

14 pages

5 pages

14 pages

7 pages

16 pages

17 pages

12 pages

View more...