Please show me working for: I really need to learn how to solve this kind of questions.
bii: The answer is 7.05cm^2
And,
5c: Answer is 39/25
Hey Aro...
first of all you have to revise the following theorem due to Thales a greek Mathematician ..
go here : Intercept theorem - Wikipedia, the free encyclopedia
in your case 3/1.8 = 3.5 /2.1 i.e 5/3 = 5/3 the ratio are the same...therefore the SEGMENTS AB and DC are parallel..and therefore the triangles ABE and ACD are similar....
the second figure reveals that angle B = angle D and angle A is common for both triangles therefore the angle c wil be equal to the angle E this ensures that these triangles are similar...
revise the similar triangles please go here Similarity (geometry) - Wikipedia, the free encyclopedia
the rest are easy....