# Trig and geometry: the area, perimeter and size of a cyclic quadrilateral

• October 12th 2009, 01:20 AM
atom360
Trig and geometry: the area, perimeter and size of a cyclic quadrilateral

ABCD is a cyclic quadrilateral with <DAB=100º, AB=7cm and BC= 8cm

i) the size of <BCD
ii) the size of <ADC
iii)the perimeter of the quadrilateral
iv)The area of the quadrilateral

I know that in geometry, a cyclic quadrilateral is a quadrilateral whose vertices all lie on a single circle.

Help is greatly appreciated
• October 12th 2009, 09:21 AM
Hello atom360
Quote:

Originally Posted by atom360

ABCD is a cyclic quadrilateral with <DAB=100º, AB=7cm and BC= 8cm

i) the size of <BCD
ii) the size of <ADC
iii)the perimeter of the quadrilateral
iv)The area of the quadrilateral

I know that in geometry, a cyclic quadrilateral is a quadrilateral whose vertices all lie on a single circle.

Help is greatly appreciated

Please check the question. It's impossible to answer with the information you've given (except for part (i), which is $80^o$). There are infinitely many cyclic quadrilaterals with different shapes and sizes that can be drawn with these dimensions.