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In the diagram, A ABC AFDE.

A
108°
C
48⁰
B D
Find the value of x.
ro
E
F
- (2x - y)°

1 Answer

4 votes

Considering congruent triangles, y is 48 degrees. In △FDE, F = 2x - 48. Using the angle sum property, x is found to be 36. Thus, x = 36 and y = 48.

To find the values of x and y, consider the congruent triangles △ABC and △FDE. Since angle C in △ABC is equal to angle E in △FDE and is given as 108 degrees, angle B in △ABC is equal to angle D in △FDE and is labeled as y. Therefore, y = 48 degrees.

Now, in △FDE, angle F is represented as 2x - y. Since we've found y to be 48 degrees, we can substitute it into the equation to get F = 2x - 48.

Now , by using angle sum property of a triangle we can find the value of x too.

In △FDE

F= 2x - 48, E = 108 and D = 48

D + E+ F = 180

48 + 108 + 2x - 48 = 180

2x + 156 = 228

2x = 72

x = 36

Therefore, the value of x is 36 and the value of y is 48.

The question probable may be:

In the figure below, △ABC ≅ △FDE. Find the value of x and y.

In △ABC Angle C = 108 which is also equal to angle E of △FDE. In △ABC Angle B = 48 which is also equal to angle D of △FDE which is labelled as y. In △FDE angle F = 2x - y. Hint find the value of y first.

In the diagram, A ABC AFDE. A 108° C 48⁰ B D Find the value of x. ro E F - (2x - y-example-1
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