Every line from the tangent to the centre is 90°. This is said in the circle theorems.
So angle OBC and ODC are 90°.
angle O is twice the size of angle F. This is another circle theorem.
Therefore angle O is 152°.
The quadrilateral of ODBC would equal to 360°. Which means 90° + 90° + 152° = 332°
360° - 332° = 28°.
The answer is 28°
Answer:
16.2
Step-by-step explanation:
Answer:2000
Step-by-step explanation:
mutiply
306.9 * 6.4
=1964.16
to one significant figure
=2000
<span>Isoscles right triangle</span>
Answer:120
DCA=25+35=60
X=DCA+60=60+60=120
Step-by-step explanation:
