trigonometry
posted by y912f
please check my answers.
1.Find the area of the sector of a circle.
r=11.8cm, thetapi/7 radians
I got 31.2cmsquared
2.Find the radius of a circle in which a central angle of pi/6radian determines a sector of area 76square meters.
I got 17.03m
3.Find the measure(in radians) of a central angle of a sector of area 45 square inches in a circle of radius 8 inches.
I need help getting the answer
4.In this question you're suppose to approximate the length by finding the necessary arc length.
A tree 520m away subtends an angle of 4degrees. find the height of the tree.
I also need help on this one
THANKS ALOT
Respond to this Question
Similar Questions

can xome1 help me plzz im stuck
HELP PLZZ...A circle has radius 2 cm,(in that circle there is a traingle ABO) O is the centre of the circle. the chord AB has length 3 cm. . BO is 2cm AO is 2cm (i) Show that ÚAOB is 1.696 radians (to three decimal places). (ii) … 
How do i do this maths question??
A sector of a circle with radius r cm contains an angle of θ radians between the bounding radii. Given that the perimeter of the sector is 7cm, express θ in terms of r and show that the area is r/2(72r)cm square. Hence, … 
trig
In a circle of radius 12 inches, a sector is formed by a central angle of pie/4 radians. Find the area of the sector to the nearest hundredth of a square inch. 
TRIG HELP ASAP
I really need help on this problem. A sector has area of 15 in^2 and central angle of 0.2 radians. Find the radius of the circle and arc length of the sector 
precalc
Find an angle between 0 and 2ð that is coterminal with the given angle. 8pi/3 A sector of a circle has a central angle of 60°. Find the area of the sector if the radius of the circle is 3 mi. 
trigonometry
A sector AOB of a circle, centre O, radius r cm, where the acute angle AOB is theta radians. Given that the perimeter of the sector is 14 cm and that the area of the sector is 10 cm^2, evaluate r and theta. 
math
A sector of a circle subtending an angle 300 degrees at the centre is used to form a cone with base radius 6cm. Find the (a.)radius of the circle (b.)volume of the cone (c.)area of the minor sector of the circle 
trigonometry
I wont be receiving credit for these problems but i was just wondering how would i answer them... A) The area of a sector of a circle with a central angle of 25π rad is 21 mm². B) The angle between 0 and 2π in radians that … 
trigonometry
find the radius of the circle whose sector area is 426 sq.cm. and central angle 24 
Mathmatics
A sector of a circle of radius 9 cm subtends angle 120 at center of the circle find the area of the sector to the nearest cm