Find the missing angle θ \theta θ for this right triangle .

So let's take a look at this practice problem here. It's a pretty quick one. We're gonna find this missing angle theta for this right triangle that's shown to us. So in other words, we wanna figure out what this angle is over here. Let's get started. How do we do that? Well, first things first, we know all angles in a triangle have to add up to a 180 degrees. So when I add up these three numbers, I should get a 180 degrees on the right side. Alright? But if you notice here, I only actually have one of the numbers. I only have 60. So how can I set up an equation for this? Well, this is gonna be 60 degrees plus some unknown angle here, which I'm trying to figure out. That's what I'm trying to figure out over here. What's this other third number that I need? Well, remember that this is a right triangle, and right triangles always mean that the one of the angles is exactly 90 degrees. The way we indicate this is by using this little symbol that looks like a square over here. Whenever you see this in any problem, in any future video, it means that that angle is equal to 90 degrees. So that's the missing number that we have over here. So So we can set up this equation here, and we can just subtract 6090 from both sides. Subtract 60, subtract 90 from both sides, and then we're we're just gonna knock it off from 180. Alright? So 180 minus 60 is a 120, and then a 120 minus 90 would give you 30 degrees. Alright? So that's what this missing number is, theta, is equal to 30 degrees. So this is 30 degrees over here, and we're done. That's the answer. One way you can also make sense of this is because all of the angles equal a 180, if this one is 90, which is half of that, and that means that these two angles should always add up to 90 as well. Alright? So that's a quick way to sort of, double check that. Alright. So that's the answer. Let me know if you have any questions. Thanks for watching.