Pythagoras theorem is used in scalene triangles to work out the other side length to do this you would need to follow the rule a2+b2=c2 in order to calculate the hypotenuse
Straight lines are 180 degrees and angle BCD is 110 degrees, and also AB and CB are the same which means 180-110=70 and 70 divided by 2 is 45 degrees so m angle A =45 degrees and m angle B= 90 degrees and ACB is 45 degrees
Last one bc it jus is the last one so put in the last one bc the last one is the right one
1/4 i think hope that helps
X=-4 is the answer for this question
