Download PIB Geometry

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project

page
1
page
2
page
3
page
4
page
5
page
6
page
7
page
8
page
9
page
10
page
11
page
12
page
13
Document related concepts
no text concepts found
Transcript 
PIB Geometry
11-2: Areas of Parallelograms, Triangles, and Rhombuses
11-2 Warm Up
Yesterday, we learned that the area of a rectangle is given by the
formula: 𝐴 = 𝑏 ∙ ℎ. Show why the area of a parallelogram must
be given by the same formula. (Hint: can you rearrange the
parallelogram below into a rectangle?)
11-1 Homework Questions?
11-2 Objectives
1. State and apply the formulas for areas of parallelograms,
triangles, and rhombuses (rhombi).
Thm 11-2: Area of a Parallelogram
Ex) Find the area:
Find the areas of the parallelograms:
What happens if we cut a parallelogram in
half? (Thm. 11-3)
Find the area of an equilateral triangle
whose perimeter is 18 cm.
Find the area of ΔACK
Thm. 11-4: Area of a rhombus
Find the area of a rhombus with sides of length 25 in. and one
diagonal of length 14 in.
The area of a rhombus is 96 in2, and the length of one
diagonal is 4 in. more than the length of the other diagonal.
What are the diagonal lengths?
11-2 Homework
p. 431: #1-23 odd, 27, 33, 35, 14, 22
Related documents