4.which quadrilaterals appear to have no right angles

Some regular quadrilaterals with no right angles are: kite, trapezium, parallelogram (excluding some normal shpaes like rectangles or squares etc), rhombus (any random four-sided whose sides does not form a 90 degree between them)

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5