What are the angle measures of triangle abc? m∠a = 30°, m∠b = 60°, m∠c = 90° m∠a = 90°, m∠b = 60°, m∠c = 30° m∠a = 60°, m∠b = 90°, m∠c = 30° m∠a = 90°, m∠b = 30°, m∠c = 60°

The correct option is:   m∠A = 90°, m∠B = 60°, m∠C = 30°

Explanation

Given sides of the triangle are....

Opposite side of ∠A is:  

Opposite side of ∠B is:   and

Opposite side of ∠C is:  

For finding the angles of triangle ABC, we need to use the Cosine rules. So....

So, the measures of ∠A, ∠B and ∠C are  90°, 60° and 30° respectively.

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step-by-step explanation:

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.