part I. Formulas & methods for Triangles, Proportions, Geometry,
Help!
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| show | alter to create problem that will result in isolation of desired variable. then compute; (10)6x-1/2y=29 60x-5y=290 2x + 5y = 20 62x=310
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| show | a straight line measures 180deg.
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| show | >The sum of all angles when two lines intersect = 360. >opposite angles are equal to eachother
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| what angle is formed by two perpendicular lines? | show 🗑
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| what kind of triangle has three angles of 60 degrees? | show 🗑
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| how do you make a right angle out of an equal lateral triangle? | show 🗑
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| What kind of triangle is characterized by having two equal sides, and thus two equal angles? | show 🗑
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| > A of triangle = >>how does this relate to calculating the area of a quadrilateral? | show 🗑
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| show | 3-4-5 Triangle is proportional to a given common multiple. thus: short side = 3, long side = 4, Hypoteneuse = 5 the actual length in any unit is not the key, only the proportion of the sides in relation to eachother.
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| if a triangle has the following measurements: s1=15, s2=20, s3=25 what type of triangle is it? | show 🗑
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| a 5-12-13 Triangle is characterized by what? | show 🗑
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| If you have a trangle w/ s1=10, s2= 24, Hypoteneuse=? What kind of trangle is this? | show 🗑
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| x: x^sq rt (3): 2x = what kind of Triangle proportions? | show 🗑
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| if we have a triangle who's side lengths are in the ratio of; 1: 1: (square root of 2)... a) What kind of Triangle do we have? b) What are the internal angles? | show 🗑
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| What are the measurements of the internal angles of an Isosceles Triangle? | show 🗑
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| A triangle who's side lengths are s1=5, Hypoteneuse=10,... a) What is the L of s2? b,c) What kind of Triangle do we have? What kind of Triangle is it? b) What are the internal angles? | show 🗑
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| show | Pythagoeran Theorem: a^2+b^2=c^2 >When you have 2 sides of a RIGHT Triangle, use to find Hypoteneuse
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| show | If you divide a Right Triangle in a way which creates two smaller right triangles,: >the resulting sides of the small triangles are proportional to the sides of the origional
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| Circumference of a Circle =.... | show 🗑
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| show | Area of Circle = (Phi) 2r
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| # of degrees in an angle formed by two radii at the center of a circle= ? (in relation to arc formed by their rotation) | show 🗑
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| show | A Trapezoid is: > a quadrilateral w/ four sides of different length > Area of Trapezoid = 1/2 (sum of all bases) x (Height)
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| show | Interest (I)= principal x interest rate x time
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| Calculate distance traveled | show 🗑
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| show | (Yb -Ya)/(Xb-Xa)= m
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| show | y= m(x)+b
OR
y= b+m(x)
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| show | X point: {(Xa+Xb)/2},
y point: {(Ya + Yb)/2)}
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| Formula for Sum of Polygon Interior Angles...(n=# of angles) | show 🗑
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| Degree measurement of a single Interior Angle of regular Polygon... n=# of sides | show 🗑
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| show | (A) Parallelogram = bh
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| show | For Rec. Prism;
(V)= lwh
(SA)= 2(lw) + 2(hw)+ 2(lh)
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| show | For General Prisms:
V= (Area of Base x Height)
SA= (Sum of the three faces) x 2
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| Right Circular Cylinder: V= SA= | show 🗑
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| cube Pyramid V= SA= | show 🗑
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| show | Sphere
V= 4/3(Π)(r^3)
SA= 4(Π)(r^2)
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| show | A = Square Root of [(C ^2)-(B^2)]
B= Square Root of [(C ^2)-(A^2)]
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| show | >angle 3 = 90
>Ratio of sides sides = 1,1, square root of (2)
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| show | >Angle 3 = 60 deg.
>Ratio of sides is:
(x): (sq.rt. of 3):(2x)
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| show | in a triangle where to side are 2, & 4,...
>the final side = 2(sq.rt (3)
>triangle is a 30:60:90 deg. tri.
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| show | L of Arch =
(L/C) = (ABC(deg)/360)
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| show | A of Arc =
Π(r^2)
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