Upcoming SlideShare
×

# G6 m5-a-lesson 4-s

85
-1

Published on

0 Likes
Statistics
Notes
• Full Name
Comment goes here.

Are you sure you want to Yes No
Your message goes here
• Be the first to comment

• Be the first to like this

Views
Total Views
85
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
1
0
Likes
0
Embeds 0
No embeds

No notes for slide

### G6 m5-a-lesson 4-s

1. 1. Lesson 4: The Area of Obtuse Triangles Using Height and Base Date: 5/27/14 S.15 15 © 2014 Common Core, Inc. Some rights reserved. commoncore.org This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. NYS COMMON CORE MATHEMATICS CURRICULUM 6•5Lesson 4 Lesson 4: The Area of Obtuse Triangles Using Height and Base Classwork Opening Exercises Draw and label the height in each triangle below. 1. 2. 3. Exploratory Challenge 1. Use rectangle “x” and the triangle with the altitude inside (triangle “x”) to show the area formula for the triangle is 𝐴 = 1 2 × 𝑏𝑎𝑠𝑒 × ℎ𝑒𝑖𝑔ℎ𝑡. a. Step One: Find the area of rectangle x. b. Step Two: What is half the area of rectangle x? c. Step Three: Prove, by decomposing triangle x, that it is the same as half of rectangle x. Please glue your decomposed triangle onto a separate sheet of paper. Glue it next to rectangle x.