Homework Statement
Homework Equations
(n-2)*180[/B]
The Attempt at a Solution
11.a: 7-2=5, 5*180= 900. 900/7= 128.57 degrees
b. How do you find the unknowns?[/B]
Homework Statement
Homework Equations
sum interior angles (n-2)*180
angles of a quadrilateral: a+b+c=d = 360
[/B]
The Attempt at a Solution
What do you do with the exterior angle?
80+130+a+x=360
Homework Statement
Find x[/B]
Homework Equations
a+b+c=180
[/B]
The Attempt at a Solution
So RP=RQ, the base angles are x and (146-x), normally the base angles are the same but in this scenario they are different.
x+146-x+?=180
Homework Statement
The three angles of a scalene triangle are x degrees, (x-12) degrees and (2x+6) degrees. What sizes are the angles?[/B]
Homework Equations
Triangle = a+b+c =180
Scalene = no equal size or angles[/B]
The Attempt at a Solution
So what do you do with (x-12) degrees and...
Homework Statement
Find what x is
I don't understand what to do with (3x-23).
Homework Equations
Angles centered at a point: a+b+c+d=360
https://drtayeb.files.wordpress.com/2011/03/igcse-math-extended.pdf
(here is a pdf of the textbook, Exercise 4A, 3i.)[/B]
The Attempt at a Solution...