PPT-1.3 Measuring Angles Objectives:

Measure angles with a protractor Identify and use the angle addition postulate WarmUp Find the indicated value AC 20 AB A B C x4 2x 3 Vocabulary Degree The most common unit of angle measure. All rights reserved This tip sheet was developed in conjunction with the Great Trays TM Partnership dap with permission by ina Ba no inda Die an and sk ey from hn al ta tool art of Io old tar le nu at in 20 Io Nu trition Proj Io De ar me of Edu atio Recognising different types of angles. What type of angle is this?. Right angle. What type of angle is this?. acute. What type of angle is this?. obtuse. What type of angle is this?. acute. What type of angle is this?. Angle Pair Relationships. Adjacent Angles. Vertical Angles. Linear Pair. Complementary Angles. Supplementary Angles. Adjacent angles are “side by side” and share a common ray.. 45. º. 15. º. These are examples of adjacent angles.. Angles are ACUTE angles Angles equal to 90 are RIGHT angles Angle are OBTUSE angles Angles equal to 180 Angles more than 180 are REFLEX angles Central Angles. Central Angle. (of a circle). Central Angle. (of a circle). NOT A. Central Angle. (of a circle). A . central angle. is an angle whose vertex is the CENTER of the circle. CENTRAL ANGLES AND ARCS. ANGLES RULES Angles about a point add to 360 Goal: . To learn how to measure angles using full-circle protractors. Now let’s review what we know about angles….. What are the names of the different parts of an angle?. How do we measure angles using the half-circle protractor?. Given circle of radius . r. , a radian is the measure of a central angle subtended by an arc length . s. equal to r. . The radian measure of an arbitrary angle. There are radians in a angle. Why? . Utilize. items in your . “STILL LIFE TOOLBOX” . Midpoints, Parallels, Measuring, Angles, Negative Space. Use Black and White Charcoal to create value and textures. Create a successful asymmetrical composition with a focal point. 9.10.15. Do Now. Define the following:. Acute angle. Straight angle. Right angle. Obtuse angle. Ray. Line. Line segment. How do you prove you are right?. Proving You . A. re Right. We write an explanation of our thinking or thought process. Shape and Angles. Assumed knowledge. recall and use properties of angles. angles at a point. angles at a point on a straight line. perpendicular lines. vertically opposite angles. distinguish between scalene, isosceles, equilateral and right-angled triangles. Protractor: . What do you notice? . Task One: . Look at the protractor. Write down everything that you notice about the protractor. Try and come up with at least . 10 facts. Think about . number patterns . Angles & Their Names. Angle: consists of two different rays with the same endpoint.. Sides: the rays of the angle.. Vertex: the endpoint of the angle.. Name the 3 angles.. or. or. or.  . Angles & Their Measures. The vertical distance from rotary table to Point B is called a true vertical depth. The inclination angle ‘I’ is the angle between vertical and the wellbore. . The direction angle ‘A’ is specified as the azimuth between the geographic north and the projection of a wellbore on a horizontal plane..