Our site uses cookies. Some of the cookies we use are essential for parts of the site to operate and have already been set. You may delete and block all cookies from this site, but parts of the site will not work. To find out more about cookies on this website, see our Cookie Policy

Your browser does not appear to have javascript enabled. This page needs JavaScript activated to work properly. Please enable javascript or choose a different browser (Chrome or Safari)

This test is run by .
Note that your final mark will not be saved in the system.

Basic Geometric Facts Diagnose

Target Level

1-3

Running Total

Attempt

1 of 1

Basic Geometric Facts

With reference to the diagram above, fill in the gaps to explain why the angle sum of the triangle must be 180°:

A = π + − ÷ × < > ≤ ≥ π (Z-angles) and B = π + − ÷ × < > ≤ ≥ π (Z-angles)

C + D + E = π + − ÷ × < > ≤ ≥ π ° (angles on a straight line)

Replacing A for π + − ÷ × < > ≤ ≥ π and B for π + − ÷ × < > ≤ ≥ π gives A + B + C = 180°, as required.

All or nothing! Good luck!

Pass Mark

100%