Given quadrangle ABCD with right angles in B and D. We also know that |BC| = 1, |CD| = 4, and |DA| = 3. What is the area of ABCD?
Try to draw quadrilateral ABCD of these specifications:
(i) AB = 7 cm, BC =5 cm, CD = 4 cm, ∠B = 60°, ∠C = 140°.
(ii) AB = 8 cm, BC = 6 cm, CD = 5.5 cm, DA = 3 cm, ∠B = 50°.
(iii) AB = 8.5 cm, BC = 4.5 cm, CD = 5 cm, DA = 6 cm, BD = 7.5 cm.