a) B 16 cm 16 cm A 0° Do C Figure 1 18 cm 15 cm NOT TO SCALE D Figure 1 shows the quadrilateral ABCD which is made up of two acute-angled triangles ABD and BCD. AB= 16 cm, AD = 18 cm, BC = 16 cm and 7 CD = 15 cm. Angle A = 0°, where cos 0 = and angle C pº. 12 i) Find an expression for cos p. Give your answer in the form a and b are integers. where ii) Find the area of triangle ABD. Give your answer in the form p√q where p and q are integers.
a) B 16 cm 16 cm A 0° Do C Figure 1 18 cm 15 cm NOT TO SCALE D Figure 1 shows the quadrilateral ABCD which is made up of two acute-angled triangles ABD and BCD. AB= 16 cm, AD = 18 cm, BC = 16 cm and 7 CD = 15 cm. Angle A = 0°, where cos 0 = and angle C pº. 12 i) Find an expression for cos p. Give your answer in the form a and b are integers. where ii) Find the area of triangle ABD. Give your answer in the form p√q where p and q are integers.
Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
Chapter3: Triangles
Section3.4: Basic Constructions Justified
Problem 37E: Draw an obtuse triangle and construct the three perpendicular bisectors of its sides. Do the...
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