Remarkable / Worksheets / Grade 7 Maths / Geometry of straight lines and angles
A one-page CAPS Grade 7 Maths poster on geometry of straight lines and angles (Shapes and space), with the key ideas, key words and a tip to remember.
Parallel lines are always the same distance apart and never meet. Perpendicular lines meet at a right angle.
a + 115° = 180°
a = 180° − 115° = 65°
90° + 130° + b = 360°
b = 360° − 220° = 140°
When two straight lines cross, the angles opposite each other are equal.
One angle is 40°.
The opposite angle is 40°.
The other two angles: 180° − 40° = 140°
28° and 62° are complementary.
28° and 152° are supplementary.
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