Area of a triangle is the region covered by its three sides in a plane. Area of a triangle is equal to half of product of its base and height. Find the area using heron's formulas and SAS condition, with examples at BYJU'S.
problems. these trigonometry values are used to measure the angles and sides of a right-angle triangle. apart from sine, cosine and tangent values, the other three major values are cotangent, secant and cosecant. when we find sin cos and tan values for a triangle, we usually consider these...
There are holograms on most driver's licenses, ID cards and credit cards. If you're not old enough to drive or use credit, you can still find holograms around your home. They're part of CD, DVD and software packaging, as well as just about everything sold as "official merchandise...
The hot sand is key to the mirage effect (or photothermal deflection), as the stiff temperature difference between sand and air bends, or refracts,lightrays. The refraction swings the light rays up toward the viewer’s eyes instead of bouncing them off the surface. In the classic example of...
Its interference fringes still exist, but they have a different index of refraction rather than a darker color. The index of refraction is the difference between how fast light travels through a medium and how fast it travels through a vacuum. For example, the speed of a wave of light can...
If a distant sound wave hits a rigid disk, it will reflect off of the point of impact according to the angle of the surface. However, with a parabolic disk, we know that the sound waves will reflect toward a very specific location: the focus. If a faint sound wave hits the disk at...
What is the difference between reflection and refraction? How to find the angle of refraction? Why frequency does not change in refraction? How to calculate the index of refraction? How do you measure the angle of incidence and refraction? What causes the bending of light in refraction? How ...
Teach children to adjust the viewing angle of the kaleidoscope to observe changes in the patterns. By rotating or tilting the kaleidoscope, they can discover how slight movements create dynamic transformations in the images reflected inside.
Pythagoras' theoremonly works for right-angled triangles, so you can use it to test whether a triangle has a right angle or not. What is Snell's law for? Snell's law (also known as Snell–Descartes law and the law of refraction) is a formula usedto describe the relationship between th...
Identification of archaeological and historical textile fibres is important because it gives insight into resource management in former times. The arrival of new tools such as table-top scanning electron microscopes, have led to an increased interest in the topic. Unfortunately, there have been cases...