ABCD is a trapezium

Calculate the area of ABCD

This is answer for finding bottom right hand corner angle where 25cm total base length is given. Where given, 4cm height trapezium with central height and central right angle, same format question but different heights as seen here in answer.

Step-by-step explanation:

AD part length 1 = 8.5² - 4² = √56.25 = 7.5cm

AD part length 2= 25-7.5 = 17.5cm

AD part length 3= 17.5- 5 = 12.5

AD total length = 7.5+ 12.5 + 5 = 25cm

Area = 1/2 x12.5 x 4 = 25  

Scalene Triangle 4/12.5 = 0.3 × 4 = 1.2

CD length size = 12.5 ² + 4² = 156.25 + 16 √172.25 = c² = 13.12cm

13.2/12.5 = 1.056

1/2 12.5 = 6.25

1/2 13.12 = 6.51.

6.25+ 6.51 + 4 = 16.76

1.056 x 16.8

CDA angle = 17.7˚

what i would say the best answer is a. 40.5

in mathematics, a constraint is a condition of an optimization problem that the solution must satisfy. there are several types of constraints—primarily equality constraints, inequality constraints, and integer constraints. the set of candidate solutions that satisfy all constraints is called the feasible set.

hoped i'm right lol