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5 cards from this section. Quick, good the night before a test.
In parallelogram ABCD, ∠A = 72°. Find ∠B, ∠C and ∠D.
Use opposite angles first, then adjacent angles.
A rectangle measures 6 cm by 8 cm. Find the length of its diagonal.
The diagonal is the hypotenuse of a right triangle.
In a parallelogram, how are two adjacent angles related?
Think about angles between two parallel lines.
A rhombus has diagonals of 6 cm and 8 cm. How long is each side?
Halve the diagonals first.
Kite ABCD has AB = AD = 13 cm, CB = CD = 20 cm and diagonal BD = 24 cm. Find the length of diagonal AC and the area of the kite.
In a kite, the main diagonal cuts the other diagonal in half at right angles.
A rectangle has a perimeter of 34 cm and a diagonal of 13 cm. Find its length and width.
Find l + w and l² + w², then use (l + w)² to find lw.
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