Question

mark the measurements of the unknown sides or angles marked by small letters in the following pairs of congruent triangles​

Answer 1

In the figure

two congruent triangle are there

so x=75° as in another triangle that angle is given 75 similarly y =45°

in ∆DEF angle D + angle E +angle F=180°

75°+45°+z=180°

z=180-75+45

z=180-120

z=60°

Answer 2

Answer:

X= 75°,y= 45°(because the triangles are congruent as they have both same size as well as shape)

X+y+z = 180°{ since, angle sum property}

75°+45°+z =180°

z= 180°-120°

z=60°