Answer:
A. 55 degrees
Step-by-step explanation:
We are given a right angled triangle ABC having the horizontal length = 10 units and vertical length = 7 units.
Now, the trigonometric form for angles of a right angled triangle gives,
[tex]\tan B=\frac{opposite}{adjacent}[/tex]
i.e. [tex]\tan B=\frac{10}{7}[/tex]
i.e. [tex]\tan B=1.42857[/tex]
i.e. [tex]B=\arctan 1.42857[/tex]
i.e. [tex]B=55.03[/tex]
Hence, the measure of angle B is 55°
