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harrym
37 Questions that I need help on it was out of a few 100 but these are the 37 that I cant get the answers for. Please help solve http://s8.postimage.org/ucuh7bw51/triangle.png 1 Calculate DE. 26.016 8 9.0553... 5.7445... 2 Determine whether or not the given side lenths will form a right triangle: 6.403124237, 4, and 5. right triangle not a right triangle 3 Calculate EG. 4.125 4.898979486 8.544003745 7.416198487 4 Determine whether or not the given side lenths will form a right triangle:15, 11, and 10.19803903 right triangle not a right triangle
http://s7.postimage.org/yo38bp7gr/triangle2.png 5 Calculate sin θ 6/√85 7/6 7/√85 6/7 6 Calculate cos θ 6/√13 7/√85 6/√85 7/√13 7 Calculate tan θ 6/7 7/6 7/√13 7√85 http://s14.postimage.org/qnna3v8sx/triangle3.png 8 Calculate sin θ 6/5 5/6 √11/6 √11/5 9 Calculate cos θ 6/5 5/6 √11/6 √11/5 10 Calculate tan θ 6/5 5/6 √11/6 √11/5 11 If sin θ = 1/√2, find the value of θ. 60° 90° 45° 30° 12 If cos θ = 2√10/7, find the value of sin θ. √89/7 √69/7 √29/7 3/7 Circles... [url= http://postimage.org/ ][img] http://s9.postimage.org/qtj3uy7iz/circle1.png [/img][/url] 13 If the measure of arc BC is 63°, calculate m<BDC. 126° 21° 63° 31.5° 14 If the measure of arc BC is 63°, calculate the measure of arc AC. 21° 63° 126° 31.5° 15 arc AB is congtuent to arc BC. false true Cannont be determined 16 the measure of arc AB is 90° false true Cannont be determined 17 m<BCD is a right angle. false true Cannont be determined 18 m<BAC congruent to or about equal to m<BDC false true Cannont be determined 19 If the measure of arc BC is 63°, Calculate m<BPC 31.5° 126° 63° 21° http://s7.postimage.org/nmm1cpu6j/circle2.png 20 If the measure of arc HL is 40°, calculate the measure of arc IO. 100° 50° 40° 140° 21 If m<GJI =78°, calculate the measure of arc GJI. 102° 204° 156° 78° Coordinates and Graphs http://s15.postimage.org/fgqc85le3/graph1.png 22 Write the equation for line AD. x + 4y = -2 2x - 3y = 7 4x + y = 7 3x - 2y = 10 http://s17.postimage.org/dg57sdd4v/graph2.png 23 Write the equation of the line with a slope of 3/7 passing through (9,-2) 3x - 7y = 41 y = 3/7x + 9 y = 3/7x - 2 2x - 9y = -3/7 24 Which type of triangle is RST right scalene isosceles equilateral 25 write the equation of the line parallel to x = -16 and passes through (9,-10) y = -6 x = 9 x = -10 y = 10 http://s12.postimage.org/5a5dng9gd/graph3.png 26 Which line has the equation y = -x + 3 DF GE GF DE 27 Which line has the equation x-3y = 3 DF GE GF DE Shapes and geometric figures 28 What is the name of the Platonic solid for which each face has one-fourth probability of turning up when it is rolled like a die dodecahedron hexahedron tetrahedron icosahedron http://s15.postimage.org/yh87r7ma3/shapes1.png 29 Calculate the volume of the figure 292 in^3 300 in^3 100 in^3 272 in^3 30 What is the surface area of the figure 292 in^2 300 in^2 146 in^2 272 in^2 31 If a spherical baseball has a diameter of 7cm, calculate the surface area of the baseball 57.167π cm^2 49π cm^2 12.25π cm^2 42.875π cm^2 32 If a spherical bubble has a volume of 36π cm^3, calculate the surface area of the bubble 9π cm^2 27π cm^2 3π cm^2 36π cm^2 [url= http://postimage.org/ ][img] http://s13.postimage.org/f9nu2fpqb/shapes1.png [/img][/url] 33 Calculate the volume of water that this figure will hold. 490π m^3 182π m^3 159.25π m^3 91π m^3 34 Calculate the surface area of the figure 82.25π m^2 168π m^2 115.5π m^2 59.5π m^2 http://s18.postimage.org/fc9x30jop/shapes2.png 35 Calculate the surface area of a regular triangular pyramid with the base edges of length 12 and a slant height of 12 72 288 216 278.35 36 Approximate the volume of the regular triangular pyramid if the height is aprroximately 11.5 717 276 239 828 37 If a spherical baseball has a diameter of 7cm, calculate the volume of the ball 12.25π m^3 57.167π m^3 42.875π m^3 49π m^3
For the first one: Looking at angle EDF (call the angle Z) you know from triangle EDG that: \[\cos{Z} = \frac{3}{DE}\] you also know that from triangle EDF that: \[\cos{Z} = \frac{DE}{11}\] Therefore \[\frac{3}{DE}=\frac{DE}{11}\to DE^2=33\to DE = \sqrt{33}\] since triangles don't have negative length sides. Note that \[\sqrt{33}\approx 5.7445\]
For #3 Once you have DE you can find GE using pythag. \[DE^2 = 3^2+EG^2\]