Given:
A figure of a triangle.
To find:
The measure of angle A.
Solution:
Label the points in the figure as shown below.
In the below figure,
(Vertically opposite angles)
(Congregant angles)

Using exterior angle theorem in triangle ABC, we get




Isolate the variable term x.




Now, the measure of angle A is:




Therefore, the correct option is B.
It depends on the given information.
McKenzie's work is correct if the two short sides are given as 5 and 13.
Cara's work is correct is almost correct if 5 is one leg, and 13 is the hypotenuse. The exact answer is 12, but she wrote it as approximately equal. That's her only problem.
By the way, Ddssaa122: when posting questions, the power of a number is written as 5^2 and not 52. If you copy and paste, please make sure you add the caret sign to indicate a power, or else you will suffer by getting a wrong answer. 5^2=5*5, 52=4*13, so they are not the same.
Answer:

Step-by-step explanation:
The triangle is an isosceles triangle. Because the triangle is an isosceles triangle, the height and base of the triangle are equal to eachother.
a² + b² = c²
right now we have c² which is 7
a² + b² = 7

because a² and b² are = to eachother
now im lost dony listen to me lol.
Answer:
0.25
Step-by-step explanation:
the answer is 1/4 or 0.25 in decimal form
Answer:6x+1-3x-1
negative and negative= positive
3x+2
answer: 3x+2
Step-by-step explanation: