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MariettaO [177]
3 years ago
12

If the measure of angle A is 40 degrees and the length of side b is 15 inches, which can be the length of side a if it is possib

le to form two triangles?
Mathematics
1 answer:
Julli [10]3 years ago
8 0
This is the concept of trigonometry, to get the possible length of side a we use the sine rule which states that:
a/sin A=b/sin B=c/sin B
where;
a,b and c are the sides
A,B and C are the angles
thus the value of A could be as follows;
assuming the triangle is an isosceles triangle, the base angles will be:
(180-40)/2=70
thus;
15/sin 70=a/sin 40
a=(15sin40)/sin70
a=10.26 inches
thus the possible size of a=10.26 inches
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