Question

what are the values of a and b?
(image of triangle def with angle at d being 48 degrees, sides de and fe marked as equal, angle at f is a, angle at e is b)
a = \boxed{\space}^\circ
b = \space^\circ
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Explanation:

Step1: Identify equal angles

The triangle has sides $DE = FE$, so $\angle D = \angle a$.
$\angle a = 48^\circ$

Step2: Calculate angle $b$

Sum of angles in a triangle is $180^\circ$.
$\angle b = 180^\circ - 48^\circ - 48^\circ$
$\angle b = 84^\circ$

Answer:

$a = 48^\circ$
$b = 84^\circ$