Question

5. Find the value of x​

Answer 1

Answer:

i think x is 100 degree

Step-by-step explanation:

that's because < CAO = 90°= < CBO(because it's a semicircle angle)

the figure ACOB is a quadrilateral so it's total angle summation should be 360°

so that means

let < BCA be y;

100° + 90° + 90° + y = 360°

y = 360° - 280°

y = 80°

now as you can see < x lies ona straight line

so

x + <BCA =180

x + 80° = 180

x = 100°