Aright triangle has legs with lengths 20 cm and 21 cm.
what is the length of the hypotenuse?
_cm

 Ue use the theorem:

 The equation relating the lengths of the sides a, b and c, often called the "Pythagorean equation": 

where c represents the length of the hypotenuse  (the side opposite the right angle) and a and b the lengths of the triangle's other two sides.

;

1/5

step-by-step explanation:

the dice has 6 sides and there is only one 5 in a dice.

∠acb = 8°

step-by-step explanation:

∠xba lies on the circle and is half the measure of the intercepted arc ax

hence

measure of arc ax = 2 × 42° = 84°

∠acb is outside the circle and is

∠acb = (arcab - arcax ), hence

∠acb = 0.5 (100 - 84) = 0.5 × 16° = 8°