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Open Up - Grade 7 - Mathematics - Unit 7 - Lesson 9

Last updated 11 months ago

7 questions

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Question 1

1.

Which of these three triangles is impossible to draw?

A triangle where one angle measures 20o and another angle measures 45o.

A triangle where one angle measures 120o and another angle measures 50o.

A triangle where one angle measures 90o and another angle measures 100o.

Question 2

2.

A triangle has an angle measuring 90o, an angle measuring 20o, and a side that is 6 units long. The 6-unit side is in between the 90o and 20o angles.

Sketch this triangle and label your sketch with the given measures.(show your work)

How many unique triangles can you draw like this?(Multiple Choice)

Every unique Triangle can be drawn like this

Only three unique Triangles can be drawn like this

Only two unique Triangles can be drawn like this

This type of Triangle does not exist.

Only one unique Triangle can be drawn like this

Question 3

3.

Find a value for x that makes -x less than 2x.

Question 4

4.

Find a value for x that makes -x greater than 2x.

Question 5

5.

One of the particles in atoms is called an electron. It has a charge of -1. Another particle in atoms is a proton. It has charge of +1.
The overall charge of an atom is the sum of the charges of the electrons and the protons. Here is a list of common elements.
Find the overall charge for the rest of the atoms on the list.

Question 6

6.

A factory produces 3 bottles of sparkling water for every 7 bottles of plain water. If those are the only two products they produce.

What percentage of their production is sparkling water?

Question 7

7.

A factory produces 3 bottles of sparkling water for every 7 bottles of plain water. If those are the only two products they produce.

What percentage is plain?

"Source: Open Up Resouces (Download for free at openupresources.org.)"