Question

construct the following triangles: calculate third angle in each triangle and measure this angle to check the accurancy of your construction.
angle BCD in which angle B= 105° cm, ANGLE BC=8.2 cm angle C= 45°​

Answer 1

Answer: angle a=20 degree

Step-by-step explanation:

a+b+c=180degree(angle sum property)

a+105°+45°= 180°

a+160=180

a= 180°-160°

a= 20°