If b= 40 degrees and c= 30 degrees, what is the measure of d?

a = 110 degree

d= 70 degree

Step-by-step explanation:

a+b+c = 180. (being sum of all interior angle of a triangle is 180 degree)

a+40+30 = 180

a=180-70

a = 110

Similarly,

a+d=180. (being supplementary angle)

110+d=180

d= 70

123m squared

Step-by-step explanation:

First let's get the area of the square by doing 10*10 to get 100, now let's find the area of the semicircle. We can pretend it is a full circle and then cut it in half. We do the radius which is 5 times, pi which is 3.14 to get 15.7. We then square that to get 246.49. Since we want a semicircle we cut that in half to get 123.245. We add this to 100 to get 123.245. Since we have to round, the answer is: The area of the figure is about 123 m2.