# Right angled triangle 3

Side b = 1.5, hypotenuse angle A = 70 degrees, Angle B = 20 degrees. Find its unknown sides length.

c =  4.3857
a =  4.1212

### Step-by-step explanation:

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$a=\sqrt{{c}^{2}-{b}^{2}}=\sqrt{4.385{7}^{2}-1.{5}^{2}}=4.1212$

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