Friday

August 22, 2014

August 22, 2014

Posted by **Isabel** on Wednesday, February 20, 2013 at 10:21pm.

- Geometry (immediate help and explanation) -
**Reiny**, Wednesday, February 20, 2013 at 10:44pmAssuming that the 36 feet wide line base is NOT a diameter, make a sketch

let the radius be x

then I see a right-angled triangle where

(x-8)^2 + 18^2 = x^2

x^2 - 16x + 64 + 324 = x^2

-16x = -388

x = 24.25

- Geometry (immediate help and explanation) -
**Isabel**, Wednesday, February 20, 2013 at 10:51pmThanks! But one question..um, where did you get the triangle?

- Geometry (immediate help and explanation) -
**Reiny**, Wednesday, February 20, 2013 at 10:56pmdraw a whole circle

draw a chord AB, your base , = 36

From the centre O draw a line OA , a radius

let the radius be x

so OA = x, the hypotenuse

from the centre draw a perpendicular to AB to hit AB at C

from C to the circle is 8 , so OC = x-8

OCA is a right - angled triangle.

so ...

see above

**Related Questions**

Trig - A bridge is built in the shape of a parabolic arch. The bridge has a span...

calculus - a suspenion bridge is in a shape of a parabola and has a length of ...

Algebra II - I'm confused.. 1. The cables of a suspension bridge are in the ...

math - The angle of elevation from a buoy to the top of a bridge is 19 degrees. ...

math - The Fred Hartman Bridge allows Texas State Road 146 to cross the Houston ...

physics - a bungee cord jumper jumps off the new river bridge. the bridge is 876...

Math - I have a question my brother asked me but I need a math expert. You have ...

algebra - You live near a bridge that goes over a river. The underside of the ...

math - The longest steel arch bridge is the new river gorge near fayetteville,...

algebra - You live near a bridge that goes over a river. The underside of the ...