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Nelson Education > School > Mathematics K-8 > Mathematics 7 > Parent Centre > Surf for More Math > Chptr 5 Lssn 2

Surf for More Math

Lesson 2 - Area of a Triangle


Use these interactive activities to encourage your child to have fun on the Web while learning about the area of a triangle.


Develop and apply the formula for the area of triangles.

Builds Upon

Student Book pages156-159

Instructions for Use

Triangle Explorer prompts your child to investigate and calculate the area of a triangle.

To use Triangle Explorer, click the "New Triangle" button. Determine the area of the triangle and input the answer into the text field. Click the "Check Answers!" button to see if the answer is correct. If your child is unsure of the answer, suggest that he or she click the "Give Hint" button to provide help.


Area of Triangles helps your child understand the formula for the area of a triangle.

To use Area of Triangles, drag the pink dots to change the dimensions of the triangle. Notice the changes in perimeter and area as the dimensions change.