43+35=78 the answer is 78
Answer:
a = 49°
Explanation:
You use the rule ‘exterior angle of a triangle’ which states that the exterior angle is equal to the sum of the two opposite interior angles.
To put it mathematically:
a + a = a + 49° (Ext angles of triangle)
a = a - a + 49°
a = 49°
Answer:
a. 122 degree is the answer
You subtract the like terms, don't forget to distribute the subtraction sign, its 7x2+5x
