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OpenStudy (anonymous):
In a coordinates system, the polar coordinates of the points A,B and C are (13,157°), (14,247°) and (15,337°) respectively. (a) Let O be the pole. Are A,O and C are collinear? Explain your answer. 【DONE】 (b) Find the area of triangle ABC.
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OpenStudy (kc_kennylau):
157+90=247 247+90=337
OpenStudy (kc_kennylau):
Find AOB and BOC then add them up
OpenStudy (anonymous):
my question is part b...
OpenStudy (anonymous):
is it 196 square unit?
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