# 7.7 Angles, Triangles, and Prisms

### Lesson 1

• I can find unknown angle measures by reasoning about adjacent angles with known measures.
• I can recognize when an angle measures $90^\circ$, $180^\circ$, or $360^\circ$.

### Lesson 2

• I can find unknown angle measures by reasoning about complementary or supplementary angles.
• I can recognize when adjacent angles are complementary or supplementary.

### Lesson 3

• I can determine if angles that are not adjacent are complementary or supplementary.
• I can explain what vertical angles are in my own words.

### Lesson 4

• I can reason through multiple steps to find unknown angle measures.
• I can recognize when an equation represents a relationship between angle measures.

### Lesson 5

• I can write an equation to represent a relationship between angle measures and solve the equation to find unknown angle measures.

### Lesson 6

• I can show that the 3 side lengths that form a triangle cannot be rearranged to form a different triangle.
• I can show that the 4 side lengths that form a quadrilateral can be rearranged to form different quadrilaterals.

### Lesson 7

• I can reason about a figure with an unknown angle.
• I can show whether or not 3 side lengths will make a triangle.

### Lesson 8

• I understand that changing which sides and angles are next to each other can make different triangles.

### Lesson 9

• Given two angle measures and one side length, I can draw different triangles with these measurements or show that these measurements determine one unique triangle or no triangle.

### Lesson 10

• Given two side lengths and one angle measure, I can draw different triangles with these measurements or show that these measurements determine one unique triangle or no triangle.

### Lesson 11

• I can explain that when a three dimensional figure is sliced it creates a face that is two dimensional.
• I can picture different cross sections of prisms and pyramids.

### Lesson 12

• I can explain why the volume of a prism can be found by multiplying the area of the base and the height of the prism.

### Lesson 13

• I can calculate the the volume of a prism with a complicated base by decomposing the base into quadrilaterals or triangles.

### Lesson 14

• I can find and use shortcuts when calculating the surface area of a prism.
• I can picture the net of a prism to help me calculate its surface area.

### Lesson 15

• I can decide whether I need to find the surface area or volume when solving a problem about a real-world situation.

### Lesson 16

• I can solve problems involving the volume and surface area of children’s play structures.

### Lesson 17

• I can build a triangular prism from scratch.