...angle is greater than either of the interior 1 opposite angles. 2. The straight lines which join the extremities of two equal and parallel straight lines towards the same parts are also themselves equal and parallel. Prove this ; and explain the use of i lie words, " towards the...

...interior angles on the same side together equal to two right angles. 8. The straight lines which join the extremities of two equal and parallel straight lines towards the same parts, ai-e themselves also equal and parallel. 9. Parallelograms upon the same base, and between the same...