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2 years ago

25. Given: TE= RI, TI = RE, Proof LTDI and LROE are right / Prove: TD=RO

Mathematics

1 answer:

zaharov [31]2 years ago

5 0

Answer:

In triangle TEI and ERI

TI = RE ( given)

angle TDI = angle ROE ( given).

TE = RI ( given).

by side angle side criteria

both the triangles are congruent

by cpct ( corresponding parts of congruent triangles)

TD is congruent to RO

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Use the cosine sum and difference identities to find the exact value. COS(5pi/12)

nydimaria [60]

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3 years ago

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Please answer i need help please i will give you brainlest please

Shkiper50 [21]

Answer:

14) 4x+10=8x-26 (corresponding angles are equal)

4x-8x=-26-10

-4x=-36

x= -36/-4= 9

x=9

15) perimeter of rectangle= 2(l+b)

2( l+ $\frac{2l}{3}$ ) = 40m

2l+ $\frac{4l}{3}$ =40

Take LCM as 3

$\frac{2l}{1}$ * $\frac{3}{3}$ + $\frac{4l}{3}$ =40

$\frac{6l+4l}{3}$ = 40

$\frac{10l}{3}$ = 40

10l=40*3

10l = 120

l= 120/10 =12 cm

l=12cm

b= 2/3 *12 = 8cm

16) 2:3:4

It can be written as 2x+3x+4x

sum of angles of a triangle =180 degree

so 2x+3x+4x=180

9x=180

x=180/9=20 degree

1st angle=2x=2*20= 40 degree

2nd angle= 3x=3*20 =60 degree

3rd angle= 4x=4*20= 80 degree

17) sum of interior angles of a pentagon is 540 degree

so, 125+88+128+60+x=540 degree

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x=540-401= 139 degree

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3 years ago

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Sergio039 [100]

145 because I added them and I did the correct answer

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3 years ago

X²-x-6 What is hcf of the polynomial

Eva8 [605]

Answer:

the highest common factor of the polynomial is (x + 2) (x - 3)

Step-by-step explanation:

The computation of the highest common factor of the polynomial is as follows:

According to the question, the following equation is given

' $x^2 - x - 6$

Now do the factorization

$x^2 -3x + 2x - 6$

x(x - 3) +2 (x - 3)

(x + 2) (x - 3)

hence, the highest common factor of the polynomial is (x + 2) (x - 3)

The same is to be considered

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3 years ago

Help 12-20. PLEASE SHOW YOUR WORK!! Homework is due tomorrow.

Digiron [165]

Answer:

12.)-5

13.)-16

14)-20

15)6

16)-13

17)1

18)-13

19)15

20)-10

Step-by-step explanation:

12.)-x=2+3

x=5/-1

so,x=-5

13.)-4=(-2×8+x)/8

-4×8=-16+x

-32+16=x

so,x=-16

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28+m=8

so,m=-20

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n=24/4

so,n=6

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a=26/-2

so,a=-13

17)a+3=2×2

a=4-3

so,a=1

18)-133+3=10x

-130=10x

so,x=-13

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5*3=v

so,v=15

20)1=3+r/5

now,

Take LCM,

We get,

1=(3*5+r*1)/5

now,

by moving 5 into LHS

We get,

1*5=15+r

5=15+r

by moving 15 into left hand side,

We get ,

5-15=r

so,r=-10 because when we subtract smaller from bigger we have to take the sign of bigger.

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4 years ago