Triangles on the Grid

Find the area of a triangle you can see, and say what has been done to a shape that moved.

7 questions, free, marked as you go with a worked explanation on every one.

What this covers

• triangle area and transformations

The questions

1. Use the grid. What is the area of the triangle drawn?
2. Use the grid. What is the area of this triangle?
3. Use the grid. What single transformation takes the upper triangle to the lower one?
4. Plot the image of the point (2, 3) after a reflection in the y-axis.
5. The point (-1, 4) is translated 3 to the right and 2 down. Plot its image.
6. Use the grid. Which of these are true of the rectangle drawn?
7. Use the grid. Which pair gives the base and the height of the triangle drawn?

Answer these free