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Please help! (Look at image)

Please help! (Look at image)-example-1
User Sgeddes
by
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1 Answer

5 votes

Answer:

Explanation:

a) The two red lines indicate that EF and DF are equal length

EF = DF

2y + 5 = 21

2y = 16

y = 8

b) The angle marks indicate that D and E are equal. all angles of a triangle add up to 180 degrees

D = E

D + E + F = 180

4x + 4x + 2x = 180

10x = 180

x = 18

c) Knowing that x = 18, solve angle F

F = 2x

F = 2(18)

F = 36

d) Angle D and E are equal. Angle E equals 4x and x = 18

D = E

D = 4x

D = 4(18)

D = 72

User Igoranze
by
8.4k points

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