Answer:
It is given that in triangle XYZ, XY = 13, YZ=20, and XZ=25.Using the law of cosines, we have
CosC=\frac{a^2+b^2-c^2}{2ab}
cosZ=\frac{(YZ)^2+(XZ)^2-(XY)^2}{2(YZ)(XZ)}
CosZ=\frac{(20)^2+(25)^2-(13)^2}{2(20)(25)}
CosZ=\frac{400+625-169}{1000}
CosZ=\frac{856}{1000}
CosZ=0.856
Z=cos^{-1}(0.856)
Z=37.13^{\circ}
Step-by-step explanation:
Answer:
D
Step-by-step explanation:
Answer:
a triangle with an angle of 90°
a triangle with an angle of 55°
a triangle with an angle of 35°
Step-by-step explanation:
Every triangles angles add up to 180°. Add the choices up:
Each of the answers is an angle measure of the triangle.
Answer:
multiply the height and width of each side to get the area
