Solve each triangle. $$ B=20^{\circ}, \quad C=70^{\circ}, \quad a=1 $$
Added by Jose H.
Step 1
Since the sum of the angles in a triangle is 180 degrees, we have: $$ A = 180^{\circ} - B - C = 180^{\circ} - 20^{\circ} - 70^{\circ} = 90^{\circ} $$ Show more…
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