1st, mark all sides of the sq as equal length as the equilateral triangles n mark all the 90degs n 60degs. U will b able to see the isosceles triangles n solve from there

Tks, but I still struck

1st use ISO triangle bec, find angle bec. Then bec n ecg are interior angles, parallel lines

To find aeb, use angles at a point

ECG 105

AEB 150

Tks Ariel, Tks Kumaravel

Don't understand ,how to find ab?

I mean aeb?

Can draw pl..

Did u label the equal lengths, 90deg n 60 degs?

Hope this help

U got a square, a equaliteral triangle n 2 ISPs triangles here

Mean isos

Yes yes.. now I totally understand.. ..cheers

Tks You

Tks Caleb

Cheers

Q1: cost of table is 312. 4 chairs are 4 units (1 unit each) and the table is 4 units (since 4x price if chair). 624/8 and then the result times 4.

Thk q!

Q2: 78. 210/7=30. Total number of girls = 80 (290-210). 3/5 of 280 = 48. 30+48=78. Hope I got it correct :)

3/5 of 80 :) (sorry am writing from my phone)

But 78 is those students wearing spectacles??

Not sure if I'm correct. But here's my working and explanation. Have a look.

Thanks!!

My pleasure