Lesson 19 Ready Math Level 7 Review

Kelly is using wire to construct a triangle for an art project. She has 4 inches of blue wire and 8 inches of green wire. Kelly is going to buy some purple wire for the third side of her triangle. She needs to buy enough wire to make a triangle, but does not want any wire left over. What is the least amount and the greatest amount of purple wire she can buy?

• Kelly could buy more than 4 inches but less than 12 inches of purple wire.

• Kelly could buy more than 12 inches but less than 4 inches of purple wire.

• Kelly could buy more than 2 inches but less than 14 inches of purple wire

• Kelly could buy more than 14 inches but less than 2 inches of purple wire

Use the triangle inequality theorem to find which sets of side lengths could form a triangle.

• 3 centimeters, 4 centimeters, 9 centimeters

• 4 cm, 6 cm, 9 cm

• 3 cm, 6 cm, 9 cm

Use the triangle inequality theorem to find which sets of side lengths could form a triangle.

• 5 centimeters, 5 centimeters, 9 centimeters

• 3 centimeters, 4 centimeters, 9 centimeters

• 3 cm, 6 cm, 9 cm

John draws triangle ABC. Line AB has a length of 10 inches and line BC has a length of 15 inches. Determine whether each measurement could be the length of side AC. Choose Yes or No.

4 inches

• Yes

• No

John draws triangle ABC. Line AB has a length of 10 inches and line BC has a length of 15 inches. Determine whether each measurement could be the length of side AC. Choose Yes or No.

15 inches

• Yes

• No

John draws triangle ABC. Line AB has a length of 10 inches and line BC has a length of 15 inches. Determine whether each measurement could be the length of side AC. Choose Yes or No.

23 inches

• Yes

• No

John draws triangle ABC. Line AB has a length of 10 inches and line BC has a length of 15 inches. Determine whether each measurement could be the length of side AC. Choose Yes or No.

5 inches

• Yes

• No

John draws triangle ABC. Line AB has a length of 10 inches and line BC has a length of 15 inches. Determine whether each measurement could be the length of side AC. Choose Yes or No.

25 inches

• Yes

• No

John draws triangle ABC. Line AB has a length of 10 inches and line BC has a length of 15 inches. Determine whether each measurement could be the length of side AC. Choose Yes or No.

10 inches

• Yes

• No

Christy and Larry use a ruler and a protractor to draw triangles with given conditions. Christy is asked to construct a triangle with a 45 degree angle and a 65 degree angle. How many different triangles could she draw with these conditions?

• exactly two triangles

• exactly one triangle

• Any number of triangles

• no triangle