4x+8(0.8) = 40
4x = 40-6.4
4x = 33.6
x = 8.4
Answer:
B = 25 because 180-25-130 = 25 and all angles within triangle add to 180 degrees
a = 6 because the triangle is isosceles and we can see symmetry and draw this to prove on two opposite lines, therefore we can now find height easier.
c = 10. 876 because 130/2 = 65 degree and with new central height we can find Right Angle and using 6 x sin (65) = 5. 438 then we multiply by 2 to find c
Then all you have to do is re-write and round to the nearest 10th and check the units and write degree sign where required.
Step-by-step explanation:
Answer
25.67 x 10 square root -2 ..........<span>is NOT written in scientific notation
should be
</span>2.567 x 10 square root -3 (in scientific notation form)
Answer:
52.8 degree
Step-by-step explanation:
x²=1.9²+2.5²
x²=9.86
x = 3.14 this is SQ
using the sine rule :
sin90/3.14 = sinx/2.5
cross multiply
after cross multiply if you are allowed to use a calculator insert shift sin
you only use this when you want to find the unknown sine angle
Answer:
C
Step-by-step explanation:
(180- 80+65 = 35) sum of the angle in a triangle.
to get the exterior angle
180 - 35 = 145 (sum of angle on a straight line is 180)