This document provides formulas and examples for calculating the areas of special quadrilaterals including rhombuses, trapezoids, and kites. It gives the formulas for the area of a rhombus as 1/2 * d1 * d2, the area of a trapezoid as 1/2 * h * (b1 + b2), and the area of a kite as 1/2 * d1 * d2, where d1 and d2 are the diagonals. It then provides example problems applying these formulas to find missing measurements or the area of different shapes. The document concludes by assigning homework problems from page 733 numbers 3 through 29 odds.

1. 11.2 Area of Special Quadrilaterals March 07, 2013
Find the area of the polygon. Bellwork
480 units2 480 units2
4. Find the area of a triangle
with side lengths 13 inches,
13 inches, and 10 inches.
60 in.2
414.0 units2
Mar 7­7:31 AM
HW pg. 733 #3­29 odds 1

2. 11.2 Area of Special Quadrilaterals March 07, 2013
11.2 Areas of Trapezoids, Rhombuses and Kites
Objectives:
1. Apply area formulas of triangles, trapezoids, & kites to solve problems.
Formula for the area of a:
Rhombus: A = 1/2 d1d2
d1
d2
12mm
9mm
9mm
12mm
Jan 23­1:12 PM
HW pg. 733 #3­29 odds 2

3. 11.2 Area of Special Quadrilaterals March 07, 2013
Trapezoid:
A =1/2h(b1 + b2)
Area = _____
10m
5m 7m
17m
Kites (which would apply to any rhombus):
To find the area of a kite, identify and label the diagonals asd1 and d2.
Then plug into the formula: A = 1/2d1d2
Area = _____
13cm
8cm
Jan 23­1:16 PM
HW pg. 733 #3­29 odds 3

4. 11.2 Area of Special Quadrilaterals March 07, 2013
Find the missing measurements.
Trapezoid NOPQ has an area of 250 square inches.
Find the height of NOPQ.
20 in
N O
h
Q 30 in P
Rhombus RSTU has an area of 675 square meters.
Find SU.
R S
15m
15m
U T
Find the area of the quadrilateral.
F
G
9 in
18 in
I H
FH = 37 in
Jan 23­2:26 PM
HW pg. 733 #3­29 odds 4

5. 11.2 Area of Special Quadrilaterals March 07, 2013
HW:
11.2 p.733
#3-29 odds
Jan 22­8:59 AM
HW pg. 733 #3­29 odds 5