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a) ii - one line of symmetry iii) - three line of symmetry iv) - four line of symmetry v) - one line of symmetry vi) - four line of symmetry.

b) i) no horn ii) stop ahead iii) give way iv) stop v) pedestrian crossing vi) crossroad.

we should obey safety rules in order to avoid accidents and drive safely, and also not to get stuck in jam.

a) ii - one line of symmetry iii) - three line of symmetry iv) - four line of symmetry v) - one line of symmetry vi) - four line of symmetry.

b) i) no horn ii) stop ahead iii) give way iv) stop v) pedestrian crossing vi) crossroad.

we should obey safety rules in order to avoid accidents and drive safely, and also not to get stuck in jam.

There is a very popular formula for solving such kind of questions. See below picture.

Thank you so much

Hence Option D is the right answer (Not B)

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PROOF: [for easy convenience, let me denote all squares by * and multiplication by 'x']

1) Since AE is perpendicular to BC, ABE is a right triangle with angle E = 90 deg.

2) Hence applying Pythagoras theorem we have, AB* = AE* + BE*

3) In similar way from the right triangle, ADE, AD* = AE* + DE*, => AE* = AD* - DE*

4) Substituting for AE* from step 3 in step 2, we have,

AB* = AD* - DE* + BE*

5) From the figure (Kindly make according to the description given in data),

BE = BD - DE

6) Substituting this in (4), AB* = AD* - DE* + (BD-DE)*

7) Expanding, AB* = AD* - DE* + BD* + DE* - 2 x BD x DE

8) Cancelling -DE* and +DE* and substituting BD = (1/2)BC

{Since, D is mid point of BC}

we get, AB* = AD* + (1/4)BC* - BC x DE

Thus it is proved that "AB^2=AD^2-BC*DE+(1/4)BC^2"

tanα=4

(5sinα+cosα)/(3sinα-cosα)=(5tan(α)+1)/(3tan(α)-1)=(5*4+1)/(3*4-1)=(21/11)

90 Degree is the answer.

x+3x = 180

4x = 180

X = 180/4

X = 45 degrees for the smaller angle.

180 – 45 = 135 degrees for the larger angle.

Proof:

45+3*45 = 180

45+135 = 180

180/2 = 90

By phythagorean triplet.

AB^2=AC^2+BC^2

(25*25)^2=7*7+BC^2

625=49+BC^2

BC^2=625-49

BC^2=576

BC=root of 576

BC=24.

sum of the one opposite angle is eqal to other so each angles are 75° each

bro I don't know this answer how to solve me

opposite angles are equal in parallelogram3x-2=63-2x5x=65X=13henceangles will be3x-2=3*13-2=39-2=3763-2x=63-2*13=63-26=37now sum of angles of a parallelogram is 360hence 37+37+2y=360y=143

(i) Will have equal potential difference across each appliance.

(ii) Each appliance has separate switch to the flow of current through it, so that each circuit can work independently.

Given,Length of train = 330 mSpeed of train = 40 km/hrLength of platform = 110 m

Distance = Speed*Time

Time taken to pass a man sitting on platform= Distance / Speed= (330+110)/40= 440/40 = 11 hours

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26x15/16.25=24 men should be employed

AB = 38 AX:XB = 9:10AX + XB = 389x +10x = 38 19x = 38 x = 38/19 x = 2Then AX = 9x = 9×2 = 18 XB = 10x = 10×2 = 20

20 is the best answer for this question

Product of students and days is constant.So, 160*90 = 180*X=> X = 80 days.

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discriminate D = b^2-4achere a=2, b= -3, c= 5D= (-3)^2-4×2×5 = 9-40 = -31<0so root are immiginary

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{(1/125)² * √(1/16³)}^-1/6

= {(1/(5*5*5*5*5*5))*(1/(4*4*4))}^-1/6

= {(5*5*5*5*5*5) * (2*2*2*2*2*2)}^1/6

= 5*2

= 10

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