...extremities of two equal straight lines towards the same parts are equal, they are also parallel. 124. DEF. A four-sided figure whose opposite sides are parallel is called a parallelogram. Thus, in the figure on page 121, if AD, BC represent two parallel straight lines, and also AB, DC then...

...are said to be parallel. 4. Point out the pairs of parallel lines in Figure 1; in Figure 2. Figure L Figure 2 Figure 3 A four-sided figure whose opposite...5. What kind of a figure is Figure 2? Figure 3? How 7><7 Figure 4 many pairs of parallel lines are there in Figure 4? 6. Name several objects that are...

...Name each. 3. Draw upon the blackboard two parallel lines; two vertical lines; two horizontal lines. A four-sided figure whose opposite sides are parallel is called a parallelogram. WRITTEN EXERCISE 1. Here is a picture showing that a triangle is half of a parallelogram of the same...

...square. 207. Lines that cannot meet, however far they are extended, are called parallel lines. 208. A four-sided figure whose opposite sides are parallel is called a parallelogram. A rectangle is a right-angled parallelogram. 209. A three-sided figure is called a triangle. A triangle...

...square. 223. Lines that cannot meet, however far they are extended, are called parallel lines. 224. A four-sided figure whose opposite sides are parallel is called a parallelogram. 225. A three-sided figure is called a triangle. A triangle is acute-angled if all its angles are acute...

...similar? 3. Draw parallelograms on your paper which are similar to the other models in Figure 32. 4. A four-sided figure whose opposite sides are parallel is called a parallelogram. 5. Why is a square a parallelogram? 6. Why is a rectangle a parallelogram? 7. Are all parallelograms rectangles?...