plz show all the steps of solving
Answers
this is hadi
lets start:
1. let's start by finding out angle b= angle a + b + c = 180degree
45 + b + 90 = 180
135 + b = 180 now lets take the 135 to the left, if 135 is positive then change it to negative
b = 180 - 135 = 45
angle b = 45 degree
2. now lets find out the side ac when two angles are same in this triangle than it is an isosceles triangle and so there are also two sides same, the hypotenuse which is the ab, will not be same as any other side as the hypotenuse in a right angled triangle is the longest so we are left with ac so
ab= ac
7 units = ac so now we have found ac as 7 units .
3. last but not the least the ab
ab is the hypotenuse as it is not connected or is opposite to the right angle which is angle c. so when we need to find the hypotenuse then we will use Pythagorean theorem as it is a right angled triangle.
bc ^2 + ac ^2 = ab ^2
7^2 + 7^2 = ab square
49 + 49 = ab square
98= ab square
9.89 is the square root of 98 and thus ab = 9.89
thanks