by triangle angle addition law
a + b + c = 180
3x +1 + 2x-1 +40 = 180
5x +40 = 180
5x = 180 - 40 = 140
x = 140/5 = 28
so
b = 2x -1 = 2×28-1= 56-1 = 55
Answer:
B
Step-by-step explanation:
if you multiply m by 2 you get 260we now want to subtract this from 360 to get 100 then we divide that by 2 to get angle n∠BEF= 50°.
We know angle k∠EBF= 90° so we now end up with adding angle ∠BEF with ∠EBF to get 140 to get angle x we subtract 140 from 180 to get 40. x=40°. so B is the correct answer
Answer:
The chord is 10cm from the center of the circle
Step-by-step explanation:
Here, we want to find the distance of the chord from the center of the circle
A line from the center to the chord will
divide the chord into two parts
each will have a measure of 48/2 = 24 cm
So now we have a right/angled triangle with hypotenuse of 26
To find the height, we use Pythagoras’ theorem which states that the sum of the squares of the other sides equal the square of hypotenuse
h ^2 + 24^2 = 26^2
h^2 = (26-24)(26+24)
h^2 = 100
h = square root of 100, which is 10
Answer:
plane
Step-by-step explanation:
because Segments ABCDE are in plane N
