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choli [55]
3 years ago
11

Triangle RSU is an equilateral triangle. RT bisects US. Find x and y. (y+12)°

Mathematics
1 answer:
Nat2105 [25]3 years ago
3 0

Answer:

x= 4

y = 6

Step-by-step explanation:

Given:

RSU is equilateral triangle

RT bisects US

To Find:

x and y

Solution:

Step 1: Finding the value of x

In an equilateral triangle,

All the sides are equal

Since RT bisects US

US =  3x+3x

Also RU  =  4x+8

Then ,

we know that

RU = US

4x+8 = 3x+3x

4x+8 = 6x

4x+ 8 -6x = 0

-2x+8 = 0

-2x = -8

x = \frac{-8}{-2}

x = 4

Step 2: Finding the value of y

In an equilateral triangle,

All the angles are equal  to 60 degrees

Then \angle URS = 30^{\circ}

But RT bisects US

Then

\angle URS = \angle URT +\angle TRS = 60^{\circ}

where

\angle URT and \angle RTS are equal

So

\angle RTS   = 30^{\circ}

In the figure

30^{\circ}  = 5y^{\circ}

y^{\circ}= \frac{30^{\circ}}{5}

y^{\circ} = 6

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