# 3 Act Math Tasks

## Organized by the Common Core States Standard (CCSS) Initiative

**Not Common Core? Go to Ontario Curriculum alignment**

# Geometry

## G-GPE.4

**Overall Expectation Description:**

G-GPE.4 – High School Geometry – Expressing Geometric Properties with Equations

Use coordinates to prove simple geometric theorems algebraically.Use coordinates to prove simple geometric theorems algebraically. For example, prove or disprove that a figure defined by four given points in the coordinate plane is a rectangle; prove or disprove that the point (1, √3) lies on the circle centered at the origin and containing the point (0, 2).

## Related 3 Act Math Tasks:

## Best Midpoint

### Who do you think did the best job drawing the midpoint?

**Shared By:**

Dan Meyer

**Math Topic:**

Use coordinates to prove simple geometric theorems algebraically.

**Common Core State Standard Alignment:**

## Best Triangle

### Who do you think did the best job drawing an equilateral triangle?

**Shared By:**

Dan Meyer

**Math Topic:**

Use coordinates to prove simple geometric theorems algebraically.

**Common Core State Standard Alignment:**