Thursday 3_4

Presentation

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Mathematics

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5th - 7th Grade

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Medium

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CCSS

8.G.A.5, 6.NS.C.7A, 3.NF.A.3D

Standards-aligned

Veronica Riker

Used 5+ times

FREE Resource

6 Slides • 8 Questions

Inequalities and triangles

Thursday 3/4 Starter

Inequalities

<\ \ \le\ \ \ge\ \ >

smaller number < greater number
Greater number > smaller number
FOR EXAMPLE:
4 < 9 and 9 > 4

Fill in the Blanks

Type answer...

Fill in the Blanks

Type answer...

Fill in the Blanks

Type answer...

Fill in the Blanks

Type answer...

Interior Angles of Triangles

Must add up to $180\degree$
Example: 45 + 45 + 90 = 180 so the angles DO MAKE A TRIANGLE
Non-example: 30 + 50 + 90 = 170 so the angles DO NOT MAKE A TRIANGLE

Multiple Choice

Do these angles add to make a triangle?

36\degree+90\degree+80\degree

Yes

Sometimes

Multiple Choice

Do these angles make a triangle?

135\degree+21\degree+24\degree

Yes

Almost

Finding missing angles

Double check what the question is asking!
If you are given two angles you can find the third:
63 + 100 + x = 180
163 + x = 180 (subtract 163)
x = 17

Fill in the Blanks

Type answer...

Solve for x

Start the same way -- add all angles up to 180

Solve for x

Find the missing angle

180 - 124 - 40 = 16

Set equal to third angle

4x = 16 (divide by 4)

x = 4

Fill in the Blanks

Type answer...

Inequalities and triangles

Thursday 3/4 Starter

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