find the measure of angle abc

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Question:Ray BD bisects angle ABC. Find the measure of angle ABC if the measure of angle ABD is represented by 7x 2 and the measure of angle DBC is represented by 5x + 10.

Answers:Ray BD bisects angle ABC. Find the measure of angle ABC if the measure of angle ABD is represented by 7x 2 and the measure of angle DBC is represented by 5x + 10. 7x-2=5x+10 2x=12 x=6 5x+10=40 angle ABC=80

Question:Given: Segment BH is the angle bisector of angle ABC. The measure of angle ABC = 105. Find the value of x. http://i167.photobucket.com/albums/u142/XOJustaGurlOX/15.jpg

Answers:Your picture doesn't match. But the answer to your picture is 4/3.

Question:In each Triangle ABC, find the measures for angle B and angle C that satisfy the given conditions. Draw diagrams to help you decide whether two triangles are possible. Remember that a triangle can have only one obtuse angle. 1. m angle A - 62 , a = 30, and b = 32 2. m angle A - 16 , a = 12, and b = 37.5 3. m angle A = 48 , a = 93, and b = 125 4. m angle A = 112 , a = 16.5, and b =5.4 5. m angle A = 23.6 , a = 9.8, and b = 17 6. m angle A = 155 , a = 12.5, and b = 8.4

Answers:Let's see... I will assume that side a is opposite angle A, side b is opposite angle B, and side c is opposite angle C. Hmm... For these problems, I'd use the Law of Cosines and the Law of Sines. Law of Cosines: c^2 = a^2+b^2-2ab cos C Law of Sines: sin A/a = sin B/b = sin C/c In each one of these problems, we have a, b and angle A. We can rewrite the Law of Cosines so that it reads: a^2 = b^2+ c^2 - 2bc cos A. Rewriting this as a quadratic would give: c^2 -(2b cos A)c + (a^2+b^2) = 0. If you use the quadratic formula, you'll have your solution(s) for c. The number of positive solutions determines the number of possible triangles that can be made with the given information (i.e., 1 or 2). Any less, and the triangle is impossible. Once you have side c solved for, you can then use the Law of Sines to find angle C: sin C = c/a * sin A. Using the inverse of sine on both sides will give you a value for C. 180 - A - C = B (since, for every triangle ABC, A+B+C=180). This will probably involve a lot of tedious work; however, if you have no diagram (like myself), this is the way to do it.

Question:Find the measure of angle DBC. 19 76 104 180 2-Angle ABC is a straight angle. The measure of angle ABD=6x-5 and the measure of angle DBC=2x+1. Find the measure of angle ABD. 23 47 121 133 3-Ray SU bisects angle RST. The measure of angle RSU=6x-3 and the measure of angle UST=5x+4. Find the measure of RSU. 7 39 41 78 4-Ray SU bisects angle RST. The measure of angle RSU=3x-1, the measure of angle UST=2x+13 and the measure of angle RST=6x-2. Find x. 12 14 41 82 5-Use the information from the previous question to find the measure of angle RSU. 12 14 41 82 Really could use some help, I don't have a book for any help,so I'm going for yahoo!! cause yall are the best!=)

Answers:1. ABD + DBC = ABC 4x + 5x + 9 = 180 9x = 171 x = 19 DBC = 5x + 9 = 95 + 9 = 104 ------- option c 2.ABD + DBC = ABC 6x 5 + 2x + 1 = 180 8x = 184 x = 23 ABD = 6x 5 = 133 ------- option d 3-Ray SU bisects angle RST. The measure of angle RSU=6x-3 and the measure of angle UST=5x+4. Find the measure of RSU. RST = RSU + UST RSU = UST 6x 3 = 5x + 4 x = 7 RSU = 42 3 = 39 -------- option b 4 RSU = 3x-1 = UST=2x+13 3x 1 = 2x + 13 x = 14 --------- option b 5. RSU = 3x 1 = 42 1 = 41 --------- option c --------

From Youtube

Finding Angle Measures :6th grader, Kat, shows us how to find missing angle measures. Part of the free Mathtrain.TV Podcast on iTunes and free Mathtrain.TV "Kids Teaching Kids" Project from Lincoln Middle School, in Santa Monica, CA.

The ABC's of Math (1st grade) :1st grader's performance of "The ABC's of Math" The ABC's of Math A is for Abacus ( ) a tool that helps us count. B is for Bar a graph that shows amount. C is for Circumference the distance around us. D is for Diamond in math it's a rhombus ( ). E is for Estimation an educated guess. F is for Fibonacci whose pattern we address. G is for Googol (10 100 ) a number too big to count. H is for Hundred a much smaller amount. I is for "IF" how math problems are begun. J is for Jupiter ( ) the 5th planet from the sun. K is for Konigsberg a problem so strange. L is for Line a graph that shows change. M is for Multiplication ( ) repeated adding action. N is for Numerator ( )--the top of a fraction. O is for Obtuse ( ) an angle as wide as the sky. P is for Percent ( ) a part of a pizza pie. Q is for Quadrilateral ( ) a shape whose sides =4. R is for Ratio 1 to 2 equals 2 to 4. S is for Symmetry ( ) where 2 sides compare. T is for Tangrams ( ) a puzzle that's a square. U is for Units ( ) of measure we get. V is for Venn Diagram--comparing parts of a set. W is for When we use math all the time! X is for Algebra ( )--mystery numbers that we find. Y is for the Y-axis--a vertical to extend. Z is for Zero which brings us to the End!